From 9729e64cb89f5038d71cba9c265f1ee98d22bbb6 Mon Sep 17 00:00:00 2001
From: GitHub Actions <actions@github.com>
Date: Tue, 9 Jul 2024 00:02:10 +0000
Subject: [PATCH] site deploy

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Source  : 6dbed9bfb9d3590fec1608a6790db799c8b702a0
Branch  : md-outputs
Author  : GitHub Actions <actions@github.com>
Time    : 2024-06-03 12:27:45 +0000
Message : markdown source builds

Auto-generated via {sandpaper}
Source  : 9fe91d663942a821f671e1d5f40b73731a32544e
Branch  : main
Author  : maneesha <829690+maneesha@users.noreply.github.com>
Time    : 2024-06-03 12:27:06 +0000
Message : Remove "simply" and "just" (#371)

Remove an instance of "simply" and change "just" to "only".

---------

Co-authored-by: James Foster <38274066+jd-foster@users.noreply.github.com>
---
 00-sql-introduction.html             | 50 ++++++++---------
 01-sql-basic-queries.html            | 62 ++++++++++-----------
 02-sql-aggregation.html              | 66 +++++++++++-----------
 03-sql-joins.html                    | 46 +++++++--------
 404.html                             | 34 ++++++------
 CODE_OF_CONDUCT.html                 | 36 ++++++------
 CONTRIBUTORS.html                    | 44 +++++++--------
 LICENSE.html                         | 48 ++++++++--------
 NEWS.html                            | 40 +++++++-------
 aio.html                             | 83 ++++++++++++++++------------
 discuss.html                         | 40 +++++++-------
 images.html                          | 30 +++++-----
 index.html                           | 36 ++++++------
 instructor-notes.html                | 51 +++++++++--------
 instructor/00-sql-introduction.html  | 52 ++++++++---------
 instructor/01-sql-basic-queries.html | 64 ++++++++++-----------
 instructor/02-sql-aggregation.html   | 68 +++++++++++------------
 instructor/03-sql-joins.html         | 48 ++++++++--------
 instructor/404.html                  | 34 ++++++------
 instructor/CODE_OF_CONDUCT.html      | 40 +++++++-------
 instructor/CONTRIBUTORS.html         | 48 ++++++++--------
 instructor/LICENSE.html              | 52 ++++++++---------
 instructor/NEWS.html                 | 44 +++++++--------
 instructor/aio.html                  | 83 ++++++++++++++++------------
 instructor/discuss.html              | 44 +++++++--------
 instructor/images.html               | 30 +++++-----
 instructor/index.html                | 34 ++++++------
 instructor/instructor-notes.html     | 51 +++++++++--------
 instructor/key-points.html           | 30 +++++-----
 instructor/profiles.html             | 30 +++++-----
 instructor/reference.html            | 48 ++++++++--------
 instructor/sql-cheat-sheet.html      | 80 +++++++++++++--------------
 key-points.html                      | 30 +++++-----
 pkgdown.yml                          |  5 +-
 profiles.html                        | 30 +++++-----
 reference.html                       | 44 +++++++--------
 sql-cheat-sheet.html                 | 76 ++++++++++++-------------
 37 files changed, 887 insertions(+), 844 deletions(-)

diff --git a/00-sql-introduction.html b/00-sql-introduction.html
index 2c9a68d3..c0e1032c 100644
--- a/00-sql-introduction.html
+++ b/00-sql-introduction.html
@@ -46,7 +46,7 @@
             </li>
           </ul></li>
       </div>
-      
+
       <div class="dropdown" id="instructor-dropdown">
         <button class="btn btn-secondary dropdown-toggle bordered-button" type="button" id="dropdownMenu1" data-bs-toggle="dropdown" aria-expanded="false">
           <i aria-hidden="true" class="icon" data-feather="eye"></i> Learner View <i data-feather="chevron-down"></i>
@@ -170,7 +170,7 @@ <h2 class="accordion-header" id="flush-headingNine">
                 </div><!--/div.accordion-flush-->
               </div><!--div.sidenav-view-selector -->
             </div><!--/div.col -->
-      
+
             <hr></div><!--/div.mobile-row -->
 
           <div class="accordion accordion-flush" id="accordionFlush11">
@@ -189,7 +189,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
     <div class="accordion-header" id="flush-heading1">
         <a href="index.html">Summary and Setup</a>
     </div><!--/div.accordion-header-->
-        
+
   </div><!--/div.accordion-item-->
 </div><!--/div.accordion-flush-->
 
@@ -203,14 +203,14 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
         </span>
       </button>
     </div><!--/div.accordion-header-->
-        
+
     <div id="flush-collapsecurrent" class="accordion-collapse collapse show" aria-labelledby="flush-headingcurrent" data-bs-parent="#accordionFlushcurrent">
       <div class="accordion-body">
         <ul><li><a href="#motivation">Motivation</a></li>
 <li><a href="#databases">Databases</a></li>
         </ul></div><!--/div.accordion-body-->
     </div><!--/div.accordion-collapse-->
-        
+
   </div><!--/div.accordion-item-->
 </div><!--/div.accordion-flush-->
 
@@ -219,7 +219,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
     <div class="accordion-header" id="flush-heading3">
         <a href="01-sql-basic-queries.html">2. Accessing Data With Queries</a>
     </div><!--/div.accordion-header-->
-        
+
   </div><!--/div.accordion-item-->
 </div><!--/div.accordion-flush-->
 
@@ -228,7 +228,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
     <div class="accordion-header" id="flush-heading4">
         <a href="02-sql-aggregation.html">3. Aggregating and Grouping Data</a>
     </div><!--/div.accordion-header-->
-        
+
   </div><!--/div.accordion-item-->
 </div><!--/div.accordion-flush-->
 
@@ -237,7 +237,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
     <div class="accordion-header" id="flush-heading5">
         <a href="03-sql-joins.html">4. Combining Data With Joins</a>
     </div><!--/div.accordion-header-->
-        
+
   </div><!--/div.accordion-item-->
 </div><!--/div.accordion-flush-->
 
@@ -269,10 +269,10 @@ <h2 class="accordion-header" id="flush-headingTwelve">
               </div>
             </div>
             <hr class="half-width resources"><a href="aio.html">See all in one page</a>
-            
+
 
             <hr class="d-none d-sm-block d-md-none"><div class="d-grid gap-1">
-            
+
             </div>
           </div><!-- /div.accordion -->
         </div><!-- /div.sidebar-inner -->
@@ -293,18 +293,18 @@ <h2 class="accordion-header" id="flush-headingTwelve">
           Home
         </a>
         <a class="chapter-link float-end" href="01-sql-basic-queries.html" rel="next">
-          Next: Accessing Data With... 
+          Next: Accessing Data With...
           <i aria-hidden="true" class="small-arrow" data-feather="arrow-right"></i>
         </a>
       </div>
       <hr></nav><main id="main-content" class="main-content"><div class="container lesson-content">
         <h1>Introducing Databases and SQL</h1>
         <p>Last updated on 2024-06-03 |
-        
+
         <a href="https://github.com/datacarpentry/sql-ecology-lesson/edit/main/episodes/00-sql-introduction.md" class="external-link">Edit this page <i aria-hidden="true" data-feather="edit"></i></a></p>
-        
-        
-        
+
+
+
         <div class="text-end">
           <button role="button" aria-pressed="false" tabindex="0" id="expand-code" class="pull-right" data-expand="Expand All Solutions " data-collapse="Collapse All Solutions "> Expand All Solutions <i aria-hidden="true" data-feather="plus"></i></button>
         </div>
@@ -344,8 +344,8 @@ <h3 id="setup">Setup<a class="anchor" aria-label="anchor" href="#setup"></a></h3
 Project dataset</a> throughout this lesson. See <a href="index.html#setup">Setup</a> for instructions on how to download the
 data, and also how to install DB Browser for SQLite.</p>
 </div>
-<section id="motivation"><h2 class="section-heading">Motivation<a class="anchor" aria-label="anchor" href="#motivation"></a>
-</h2>
+<section><h2 class="section-heading" id="motivation">Motivation<a class="anchor" aria-label="anchor" href="#motivation"></a>
+<a class="anchor" aria-label="anchor" href="#motivation"></a></h2>
 <hr class="half-width"><p>To start, let’s orient ourselves in our project workflow. Previously,
 we used Excel and OpenRefine to go from messy, human created data to
 cleaned, computer-readable data. Now we’re going to move to the next
@@ -437,8 +437,8 @@ <h3 class="callout-title">Definition: <em>Relational Database</em><a class="anch
 </div>
 </div>
 </div>
-</section><section id="databases"><h2 class="section-heading">Databases<a class="anchor" aria-label="anchor" href="#databases"></a>
-</h2>
+</section><section><h2 class="section-heading" id="databases">Databases<a class="anchor" aria-label="anchor" href="#databases"></a>
+<a class="anchor" aria-label="anchor" href="#databases"></a></h2>
 <hr class="half-width"><div class="section level3">
 <h3 id="why-use-relational-databases">Why use relational databases<a class="anchor" aria-label="anchor" href="#why-use-relational-databases"></a></h3>
 <p>Using a relational database serves several purposes.</p>
@@ -776,7 +776,7 @@ <h3 class="callout-title">Key Points<a class="anchor" aria-label="anchor" href="
           Home
         </a>
         <a class="chapter-link float-end" href="01-sql-basic-queries.html" rel="next">
-          Next: Accessing Data With... 
+          Next: Accessing Data With...
           <i aria-hidden="true" class="small-arrow" data-feather="arrow-right"></i>
         </a>
       </div>
@@ -787,18 +787,18 @@ <h3 class="callout-title">Key Points<a class="anchor" aria-label="anchor" href="
       		<footer class="row footer mx-md-3"><hr><div class="col-md-6">
         <p>This lesson is subject to the <a href="CODE_OF_CONDUCT.html">Code of Conduct</a></p>
         <p>
-        
+
         <a href="https://github.com/datacarpentry/sql-ecology-lesson/edit/main/episodes/00-sql-introduction.md" class="external-link">Edit on GitHub</a>
-        
+
 	
         | <a href="https://github.com/datacarpentry/sql-ecology-lesson/blob/main/CONTRIBUTING.md" class="external-link">Contributing</a>
         | <a href="https://github.com/datacarpentry/sql-ecology-lesson/" class="external-link">Source</a></p>
 				<p><a href="https://github.com/datacarpentry/sql-ecology-lesson/blob/main/CITATION" class="external-link">Cite</a> | <a href="mailto:team@carpentries.org">Contact</a> | <a href="https://carpentries.org/about/" class="external-link">About</a></p>
 			</div>
 			<div class="col-md-6">
-        
+
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
-        
+
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
         <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.5" class="external-link">sandpaper (0.16.5)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.3" class="external-link">varnish (1.0.3)</a></p>
 			</div>
@@ -823,7 +823,7 @@ <h3 class="callout-title">Key Points<a class="anchor" aria-label="anchor" href="
   "identifier": "https://datacarpentry.github.io/sql-ecology-lesson/00-sql-introduction.html",
   "dateCreated": "2015-02-10",
   "dateModified": "2024-06-03",
-  "datePublished": "2024-07-02"
+  "datePublished": "2024-07-09"
 }
 
   </script><script>
diff --git a/01-sql-basic-queries.html b/01-sql-basic-queries.html
index bd04c6d2..9d95a510 100644
--- a/01-sql-basic-queries.html
+++ b/01-sql-basic-queries.html
@@ -46,7 +46,7 @@
             </li>
           </ul></li>
       </div>
-      
+
       <div class="dropdown" id="instructor-dropdown">
         <button class="btn btn-secondary dropdown-toggle bordered-button" type="button" id="dropdownMenu1" data-bs-toggle="dropdown" aria-expanded="false">
           <i aria-hidden="true" class="icon" data-feather="eye"></i> Learner View <i data-feather="chevron-down"></i>
@@ -170,7 +170,7 @@ <h2 class="accordion-header" id="flush-headingNine">
                 </div><!--/div.accordion-flush-->
               </div><!--div.sidenav-view-selector -->
             </div><!--/div.col -->
-      
+
             <hr></div><!--/div.mobile-row -->
 
           <div class="accordion accordion-flush" id="accordionFlush11">
@@ -189,7 +189,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
     <div class="accordion-header" id="flush-heading1">
         <a href="index.html">Summary and Setup</a>
     </div><!--/div.accordion-header-->
-        
+
   </div><!--/div.accordion-item-->
 </div><!--/div.accordion-flush-->
 
@@ -198,7 +198,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
     <div class="accordion-header" id="flush-heading2">
         <a href="00-sql-introduction.html">1. Introducing Databases and SQL</a>
     </div><!--/div.accordion-header-->
-        
+
   </div><!--/div.accordion-item-->
 </div><!--/div.accordion-flush-->
 
@@ -212,7 +212,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
         </span>
       </button>
     </div><!--/div.accordion-header-->
-        
+
     <div id="flush-collapsecurrent" class="accordion-collapse collapse show" aria-labelledby="flush-headingcurrent" data-bs-parent="#accordionFlushcurrent">
       <div class="accordion-body">
         <ul><li><a href="#writing-my-first-query">Writing my first query</a></li>
@@ -222,7 +222,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
 <li><a href="#order-of-execution">Order of execution</a></li>
         </ul></div><!--/div.accordion-body-->
     </div><!--/div.accordion-collapse-->
-        
+
   </div><!--/div.accordion-item-->
 </div><!--/div.accordion-flush-->
 
@@ -231,7 +231,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
     <div class="accordion-header" id="flush-heading4">
         <a href="02-sql-aggregation.html">3. Aggregating and Grouping Data</a>
     </div><!--/div.accordion-header-->
-        
+
   </div><!--/div.accordion-item-->
 </div><!--/div.accordion-flush-->
 
@@ -240,7 +240,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
     <div class="accordion-header" id="flush-heading5">
         <a href="03-sql-joins.html">4. Combining Data With Joins</a>
     </div><!--/div.accordion-header-->
-        
+
   </div><!--/div.accordion-item-->
 </div><!--/div.accordion-flush-->
 
@@ -272,10 +272,10 @@ <h2 class="accordion-header" id="flush-headingTwelve">
               </div>
             </div>
             <hr class="half-width resources"><a href="aio.html">See all in one page</a>
-            
+
 
             <hr class="d-none d-sm-block d-md-none"><div class="d-grid gap-1">
-            
+
             </div>
           </div><!-- /div.accordion -->
         </div><!-- /div.sidebar-inner -->
@@ -296,18 +296,18 @@ <h2 class="accordion-header" id="flush-headingTwelve">
           Previous: Introducing
         </a>
         <a class="chapter-link float-end" href="02-sql-aggregation.html" rel="next">
-          Next: Aggregating and... 
+          Next: Aggregating and...
           <i aria-hidden="true" class="small-arrow" data-feather="arrow-right"></i>
         </a>
       </div>
       <hr></nav><main id="main-content" class="main-content"><div class="container lesson-content">
         <h1>Accessing Data With Queries</h1>
         <p>Last updated on 2023-04-21 |
-        
+
         <a href="https://github.com/datacarpentry/sql-ecology-lesson/edit/main/episodes/01-sql-basic-queries.md" class="external-link">Edit this page <i aria-hidden="true" data-feather="edit"></i></a></p>
-        
-        
-        
+
+
+
         <div class="text-end">
           <button role="button" aria-pressed="false" tabindex="0" id="expand-code" class="pull-right" data-expand="Expand All Solutions " data-collapse="Collapse All Solutions "> Expand All Solutions <i aria-hidden="true" data-feather="plus"></i></button>
         </div>
@@ -337,8 +337,8 @@ <h3 class="card-title">Objectives</h3>
 </div>
 </div>
 </div>
-<section id="writing-my-first-query"><h2 class="section-heading">Writing my first query<a class="anchor" aria-label="anchor" href="#writing-my-first-query"></a>
-</h2>
+<section><h2 class="section-heading" id="writing-my-first-query">Writing my first query<a class="anchor" aria-label="anchor" href="#writing-my-first-query"></a>
+<a class="anchor" aria-label="anchor" href="#writing-my-first-query"></a></h2>
 <hr class="half-width"><p>Let’s start by using the <strong>surveys</strong> table. Here we have
 data on every individual that was captured at the site, including when
 they were captured, what plot they were captured on, their species ID,
@@ -464,8 +464,8 @@ <h3 class="code-label">SQL<i aria-hidden="true" data-feather="chevron-left"></i>
 </div>
 </div>
 </div>
-</section><section id="filtering"><h2 class="section-heading">Filtering<a class="anchor" aria-label="anchor" href="#filtering"></a>
-</h2>
+</section><section><h2 class="section-heading" id="filtering">Filtering<a class="anchor" aria-label="anchor" href="#filtering"></a>
+<a class="anchor" aria-label="anchor" href="#filtering"></a></h2>
 <hr class="half-width"><p>Databases can also filter data – selecting only the data meeting
 certain criteria. For example, let’s say we only want data for the
 species <em>Dipodomys merriami</em>, which has a species code of DM. We
@@ -542,8 +542,8 @@ <h3 class="code-label">SQL<i aria-hidden="true" data-feather="chevron-left"></i>
 </div>
 </div>
 </div>
-</section><section id="building-more-complex-queries"><h2 class="section-heading">Building more complex queries<a class="anchor" aria-label="anchor" href="#building-more-complex-queries"></a>
-</h2>
+</section><section><h2 class="section-heading" id="building-more-complex-queries">Building more complex queries<a class="anchor" aria-label="anchor" href="#building-more-complex-queries"></a>
+<a class="anchor" aria-label="anchor" href="#building-more-complex-queries"></a></h2>
 <hr class="half-width"><p>Now, let’s combine the above queries to get data for the 3
 <em>Dipodomys</em> species from the year 2000 on. This time, let’s use
 IN as one way to make the query easier to understand. It is equivalent
@@ -581,8 +581,8 @@ <h3 class="code-label">SQL<i aria-hidden="true" data-feather="chevron-left"></i>
 <p>Although SQL queries often read like plain English, it is
 <em>always</em> useful to add comments; this is especially true of more
 complex queries.</p>
-</section><section id="sorting"><h2 class="section-heading">Sorting<a class="anchor" aria-label="anchor" href="#sorting"></a>
-</h2>
+</section><section><h2 class="section-heading" id="sorting">Sorting<a class="anchor" aria-label="anchor" href="#sorting"></a>
+<a class="anchor" aria-label="anchor" href="#sorting"></a></h2>
 <hr class="half-width"><p>We can also sort the results of our queries by using
 <code>ORDER BY</code>. For simplicity, let’s go back to the
 <strong>species</strong> table and alphabetize it by taxa.</p>
@@ -655,8 +655,8 @@ <h3 class="code-label">SQL<i aria-hidden="true" data-feather="chevron-left"></i>
 </div>
 </div>
 </div>
-</section><section id="order-of-execution"><h2 class="section-heading">Order of execution<a class="anchor" aria-label="anchor" href="#order-of-execution"></a>
-</h2>
+</section><section><h2 class="section-heading" id="order-of-execution">Order of execution<a class="anchor" aria-label="anchor" href="#order-of-execution"></a>
+<a class="anchor" aria-label="anchor" href="#order-of-execution"></a></h2>
 <hr class="half-width"><p>Another note for ordering. We don’t actually have to display a column
 to sort by it. For example, let’s say we want to order the birds by
 their species ID, but we only want to see genus and species.</p>
@@ -759,7 +759,7 @@ <h3 class="callout-title">Key Points<a class="anchor" aria-label="anchor" href="
           Previous: Introducing
         </a>
         <a class="chapter-link float-end" href="02-sql-aggregation.html" rel="next">
-          Next: Aggregating and... 
+          Next: Aggregating and...
           <i aria-hidden="true" class="small-arrow" data-feather="arrow-right"></i>
         </a>
       </div>
@@ -770,18 +770,18 @@ <h3 class="callout-title">Key Points<a class="anchor" aria-label="anchor" href="
       		<footer class="row footer mx-md-3"><hr><div class="col-md-6">
         <p>This lesson is subject to the <a href="CODE_OF_CONDUCT.html">Code of Conduct</a></p>
         <p>
-        
+
         <a href="https://github.com/datacarpentry/sql-ecology-lesson/edit/main/episodes/01-sql-basic-queries.md" class="external-link">Edit on GitHub</a>
-        
+
 	
         | <a href="https://github.com/datacarpentry/sql-ecology-lesson/blob/main/CONTRIBUTING.md" class="external-link">Contributing</a>
         | <a href="https://github.com/datacarpentry/sql-ecology-lesson/" class="external-link">Source</a></p>
 				<p><a href="https://github.com/datacarpentry/sql-ecology-lesson/blob/main/CITATION" class="external-link">Cite</a> | <a href="mailto:team@carpentries.org">Contact</a> | <a href="https://carpentries.org/about/" class="external-link">About</a></p>
 			</div>
 			<div class="col-md-6">
-        
+
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
-        
+
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
         <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.5" class="external-link">sandpaper (0.16.5)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.3" class="external-link">varnish (1.0.3)</a></p>
 			</div>
@@ -806,7 +806,7 @@ <h3 class="callout-title">Key Points<a class="anchor" aria-label="anchor" href="
   "identifier": "https://datacarpentry.github.io/sql-ecology-lesson/01-sql-basic-queries.html",
   "dateCreated": "2015-02-10",
   "dateModified": "2023-04-21",
-  "datePublished": "2024-07-02"
+  "datePublished": "2024-07-09"
 }
 
   </script><script>
diff --git a/02-sql-aggregation.html b/02-sql-aggregation.html
index 3f57cfe7..7d5653c5 100644
--- a/02-sql-aggregation.html
+++ b/02-sql-aggregation.html
@@ -46,7 +46,7 @@
             </li>
           </ul></li>
       </div>
-      
+
       <div class="dropdown" id="instructor-dropdown">
         <button class="btn btn-secondary dropdown-toggle bordered-button" type="button" id="dropdownMenu1" data-bs-toggle="dropdown" aria-expanded="false">
           <i aria-hidden="true" class="icon" data-feather="eye"></i> Learner View <i data-feather="chevron-down"></i>
@@ -170,7 +170,7 @@ <h2 class="accordion-header" id="flush-headingNine">
                 </div><!--/div.accordion-flush-->
               </div><!--div.sidenav-view-selector -->
             </div><!--/div.col -->
-      
+
             <hr></div><!--/div.mobile-row -->
 
           <div class="accordion accordion-flush" id="accordionFlush11">
@@ -189,7 +189,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
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         </a>
         <a class="chapter-link float-end" href="03-sql-joins.html" rel="next">
-          Next: Combining Data With... 
+          Next: Combining Data With...
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       <hr></nav><main id="main-content" class="main-content"><div class="container lesson-content">
         <h1>Aggregating and Grouping Data</h1>
         <p>Last updated on 2023-04-21 |
-        
+
         <a href="https://github.com/datacarpentry/sql-ecology-lesson/edit/main/episodes/02-sql-aggregation.md" class="external-link">Edit this page <i aria-hidden="true" data-feather="edit"></i></a></p>
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@@ -344,8 +344,8 @@ <h3 class="card-title">Objectives</h3>
 </div>
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 </div>
-<section id="count-and-group-by"><h2 class="section-heading">COUNT and GROUP BY<a class="anchor" aria-label="anchor" href="#count-and-group-by"></a>
-</h2>
+<section><h2 class="section-heading" id="count-and-group-by">COUNT and GROUP BY<a class="anchor" aria-label="anchor" href="#count-and-group-by"></a>
+<a class="anchor" aria-label="anchor" href="#count-and-group-by"></a></h2>
 <hr class="half-width"><p>Aggregation allows us to combine results by grouping records based on
 value. It is also useful for calculating combined values in groups.</p>
 <p>Let’s go to the surveys table and find out how many individuals there
@@ -477,8 +477,8 @@ <h3 class="code-label">SQL<i aria-hidden="true" data-feather="chevron-left"></i>
 </div>
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-</section><section id="ordering-aggregated-results"><h2 class="section-heading">Ordering Aggregated Results<a class="anchor" aria-label="anchor" href="#ordering-aggregated-results"></a>
-</h2>
+</section><section><h2 class="section-heading" id="ordering-aggregated-results">Ordering Aggregated Results<a class="anchor" aria-label="anchor" href="#ordering-aggregated-results"></a>
+<a class="anchor" aria-label="anchor" href="#ordering-aggregated-results"></a></h2>
 <hr class="half-width"><p>We can order the results of our aggregation by a specific column,
 including the aggregated column. Let’s count the number of individuals
 of each species captured, ordered by the count:</p>
@@ -490,8 +490,8 @@ <h3 class="code-label">SQL<i aria-hidden="true" data-feather="chevron-left"></i>
 <span id="cb8-3"><a href="#cb8-3" tabindex="-1"></a><span class="kw">GROUP</span> <span class="kw">BY</span> species_id</span>
 <span id="cb8-4"><a href="#cb8-4" tabindex="-1"></a><span class="kw">ORDER</span> <span class="kw">BY</span> <span class="fu">COUNT</span>(species_id);</span></code></pre>
 </div>
-</section><section id="aliases"><h2 class="section-heading">Aliases<a class="anchor" aria-label="anchor" href="#aliases"></a>
-</h2>
+</section><section><h2 class="section-heading" id="aliases">Aliases<a class="anchor" aria-label="anchor" href="#aliases"></a>
+<a class="anchor" aria-label="anchor" href="#aliases"></a></h2>
 <hr class="half-width"><p>As queries get more complex, the expressions we use can get long and
 unwieldy. To help make things clearer in the query and in its output, we
 can use aliases to assign new names to things in the query.</p>
@@ -529,8 +529,8 @@ <h3 class="code-label">SQL<i aria-hidden="true" data-feather="chevron-left"></i>
 </div>
 <p>Aliasing table names can be helpful when working with queries that
 involve multiple tables; you will learn more about this later.</p>
-</section><section id="the-having-keyword"><h2 class="section-heading">The <code>HAVING</code> keyword<a class="anchor" aria-label="anchor" href="#the-having-keyword"></a>
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+</section><section><h2 class="section-heading" id="the-having-keyword">The <code>HAVING</code> keyword<a class="anchor" aria-label="anchor" href="#the-having-keyword"></a>
+<a class="anchor" aria-label="anchor" href="#the-having-keyword"></a></h2>
 <hr class="half-width"><p>In the previous episode, we have seen the keyword <code>WHERE</code>,
 allowing to filter the results according to some criteria. SQL offers a
 mechanism to filter the results based on <strong>aggregate
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-</h2>
+</section><section><h2 class="section-heading" id="saving-queries-for-future-use">Saving Queries for Future Use<a class="anchor" aria-label="anchor" href="#saving-queries-for-future-use"></a>
+<a class="anchor" aria-label="anchor" href="#saving-queries-for-future-use"></a></h2>
 <hr class="half-width"><p>It is not uncommon to repeat the same operation more than once, for
 example for monitoring or reporting purposes. SQL comes with a very
 powerful mechanism to do this by creating views. Views are a form of
@@ -640,8 +640,8 @@ <h3 class="code-label">SQL<i aria-hidden="true" data-feather="chevron-left"></i>
 <span id="cb18-2"><a href="#cb18-2" tabindex="-1"></a><span class="kw">FROM</span> summer_2000</span>
 <span id="cb18-3"><a href="#cb18-3" tabindex="-1"></a><span class="kw">WHERE</span> species_id <span class="op">=</span> <span class="st">'PE'</span>;</span></code></pre>
 </div>
-</section><section id="what-about-null"><h2 class="section-heading">What About NULL?<a class="anchor" aria-label="anchor" href="#what-about-null"></a>
-</h2>
+</section><section><h2 class="section-heading" id="what-about-null">What About NULL?<a class="anchor" aria-label="anchor" href="#what-about-null"></a>
+<a class="anchor" aria-label="anchor" href="#what-about-null"></a></h2>
 <hr class="half-width"><p>From the last example, there should only be five records. If you look
 at the <code>weight</code> column, it’s easy to see what the average
 weight would be. If we use SQL to find the average weight, SQL behaves
@@ -749,7 +749,7 @@ <h3 class="callout-title">Key Points<a class="anchor" aria-label="anchor" href="
           Previous: Accessing Data With
         </a>
         <a class="chapter-link float-end" href="03-sql-joins.html" rel="next">
-          Next: Combining Data With... 
+          Next: Combining Data With...
           <i aria-hidden="true" class="small-arrow" data-feather="arrow-right"></i>
         </a>
       </div>
@@ -760,18 +760,18 @@ <h3 class="callout-title">Key Points<a class="anchor" aria-label="anchor" href="
       		<footer class="row footer mx-md-3"><hr><div class="col-md-6">
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         | <a href="https://github.com/datacarpentry/sql-ecology-lesson/" class="external-link">Source</a></p>
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@@ -796,7 +796,7 @@ <h3 class="callout-title">Key Points<a class="anchor" aria-label="anchor" href="
   "identifier": "https://datacarpentry.github.io/sql-ecology-lesson/02-sql-aggregation.html",
   "dateCreated": "2015-02-10",
   "dateModified": "2023-04-21",
-  "datePublished": "2024-07-02"
+  "datePublished": "2024-07-09"
 }
 
   </script><script>
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         <a href="index.html">Summary and Setup</a>
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             <hr class="half-width resources"><a href="aio.html">See all in one page</a>
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             <hr class="d-none d-sm-block d-md-none"><div class="d-grid gap-1">
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       <hr></nav><main id="main-content" class="main-content"><div class="container lesson-content">
         <h1>Combining Data With Joins</h1>
         <p>Last updated on 2024-06-03 |
-        
+
         <a href="https://github.com/datacarpentry/sql-ecology-lesson/edit/main/episodes/03-sql-joins.md" class="external-link">Edit this page <i aria-hidden="true" data-feather="edit"></i></a></p>
-        
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           <button role="button" aria-pressed="false" tabindex="0" id="expand-code" class="pull-right" data-expand="Expand All Solutions " data-collapse="Collapse All Solutions "> Expand All Solutions <i aria-hidden="true" data-feather="plus"></i></button>
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@@ -336,8 +336,8 @@ <h3 class="card-title">Objectives</h3>
 </div>
 </div>
 </div>
-<section id="joins"><h2 class="section-heading">Joins<a class="anchor" aria-label="anchor" href="#joins"></a>
-</h2>
+<section><h2 class="section-heading" id="joins">Joins<a class="anchor" aria-label="anchor" href="#joins"></a>
+<a class="anchor" aria-label="anchor" href="#joins"></a></h2>
 <hr class="half-width"><p>To combine data from two tables we use an SQL <code>JOIN</code>
 clause, which comes after the <code>FROM</code> clause.</p>
 <p>Database tables are used to organize and group data by common
@@ -753,9 +753,9 @@ <h3 class="code-label">SQL<i aria-hidden="true" data-feather="chevron-left"></i>
 </div>
 </div>
 </div>
-</section><section id="functions-coalesce-and-nullif-and-more"><h2 class="section-heading">Functions <code>COALESCE</code> and <code>NULLIF</code> and
+</section><section><h2 class="section-heading" id="functions-coalesce-and-nullif-and-more">Functions <code>COALESCE</code> and <code>NULLIF</code> and
 more<a class="anchor" aria-label="anchor" href="#functions-coalesce-and-nullif-and-more"></a>
-</h2>
+<a class="anchor" aria-label="anchor" href="#functions-coalesce-and-nullif-and-more"></a></h2>
 <hr class="half-width"><p>SQL includes numerous functions for manipulating data. You’ve already
 seen some of these being used for aggregation (<code>SUM</code> and
 <code>COUNT</code>) but there are functions that operate on individual
@@ -1134,18 +1134,18 @@ <h3 class="callout-title">Key Points<a class="anchor" aria-label="anchor" href="
       		<footer class="row footer mx-md-3"><hr><div class="col-md-6">
         <p>This lesson is subject to the <a href="CODE_OF_CONDUCT.html">Code of Conduct</a></p>
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   "dateCreated": "2015-02-10",
   "dateModified": "2024-06-03",
-  "datePublished": "2024-07-02"
+  "datePublished": "2024-07-09"
 }
 
   </script><script>
diff --git a/404.html b/404.html
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+++ b/404.html
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         <a href="https://datacarpentry.github.io/sql-ecology-lesson/01-sql-basic-queries.html" class="external-link">2. Accessing Data With Queries</a>
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+<section><h2 class="section-heading" id="our-apologies">Our apologies!<a class="anchor" aria-label="anchor" href="#our-apologies"></a>
+<a class="anchor" aria-label="anchor" href="#our-apologies"></a></h2>
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+
         <a href="https://github.com/datacarpentry/sql-ecology-lesson/edit/main/README.md" class="external-link">Edit on GitHub</a>
-        
+
 	
         | <a href="https://github.com/datacarpentry/sql-ecology-lesson/blob/main/CONTRIBUTING.md" class="external-link">Contributing</a>
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 			<div class="col-md-6">
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+
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
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         <h1>Contributor Code of Conduct</h1>
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-        
+
         <a href="https://github.com/datacarpentry/sql-ecology-lesson/edit/main/CODE_OF_CONDUCT.md" class="external-link">Edit on GitHub</a>
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         | <a href="https://github.com/datacarpentry/sql-ecology-lesson/blob/main/CONTRIBUTING.md" class="external-link">Contributing</a>
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 				<p><a href="https://github.com/datacarpentry/sql-ecology-lesson/blob/main/CITATION" class="external-link">Cite</a> | <a href="mailto:team@carpentries.org">Contact</a> | <a href="https://carpentries.org/about/" class="external-link">About</a></p>
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 			<div class="col-md-6">
-        
+
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
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+
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               </div>
             </div>
             <hr class="half-width resources"><a href="aio.html">See all in one page</a>
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+
 
             <hr class="d-none d-sm-block d-md-none"><div class="d-grid gap-1">
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         <h1></h1>
         <p>Last updated on 2023-04-21 |
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-        
-        
-        
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         </div>
@@ -306,8 +306,8 @@ <h1></h1>
 with the development and instruction of lessons by Karen Cranston,
 Hilmar Lapp, Tracy Teal and Ethan White and contributions from Deb Paul
 and Mike Smorul.</p>
-<section id="data"><h2 class="section-heading">Data<a class="anchor" aria-label="anchor" href="#data"></a>
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+<section><h2 class="section-heading" id="data">Data<a class="anchor" aria-label="anchor" href="#data"></a>
+<a class="anchor" aria-label="anchor" href="#data"></a></h2>
 <hr class="half-width"><p>Data is from the Portal Project Teaching Database by S. K. Morgan
 Ernest, Thomas J. Valone, James H. Brown, and Ethan P. White.</p>
 <p><a href="https://doi.org/10.6084/m9.figshare.1314459" class="external-link uri">https://doi.org/10.6084/m9.figshare.1314459</a></p>
@@ -316,8 +316,8 @@ <h1></h1>
 manipulation of a Chihuahuan Desert ecosystem near Portal, Arizona, USA.
 Ecology 90:1708.</p>
 <p><a href="https://esapubs.org/archive/ecol/E090/118/" class="external-link uri">https://esapubs.org/archive/ecol/E090/118/</a></p>
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+<a class="anchor" aria-label="anchor" href="#contributors"></a></h2>
 <hr class="half-width"><ul><li>Ethan White</li>
 <li>Greg Wilson</li>
 <li>Josh Herr</li>
@@ -346,18 +346,18 @@ <h1></h1>
       		<footer class="row footer mx-md-3"><hr><div class="col-md-6">
         <p>This lesson is subject to the <a href="CODE_OF_CONDUCT.html">Code of Conduct</a></p>
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+
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         | <a href="https://github.com/datacarpentry/sql-ecology-lesson/blob/main/CONTRIBUTING.md" class="external-link">Contributing</a>
         | <a href="https://github.com/datacarpentry/sql-ecology-lesson/" class="external-link">Source</a></p>
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diff --git a/LICENSE.html b/LICENSE.html
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               </div><!--div.sidenav-view-selector -->
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+
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           <div class="accordion accordion-flush" id="accordionFlush11">
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@@ -207,7 +207,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
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@@ -216,7 +216,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
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@@ -225,7 +225,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
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         <a href="03-sql-joins.html">4. Combining Data With Joins</a>
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+
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@@ -257,10 +257,10 @@ <h2 class="accordion-header" id="flush-headingTwelve">
               </div>
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             <hr class="half-width resources"><a href="aio.html">See all in one page</a>
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@@ -288,19 +288,19 @@ <h2 class="accordion-header" id="flush-headingTwelve">
       <hr></nav><main id="main-content" class="main-content"><div class="container lesson-content">
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         </div>
 
         
 
-<section id="instructional-material"><h2 class="section-heading">Instructional Material<a class="anchor" aria-label="anchor" href="#instructional-material"></a>
-</h2>
+<section><h2 class="section-heading" id="instructional-material">Instructional Material<a class="anchor" aria-label="anchor" href="#instructional-material"></a>
+<a class="anchor" aria-label="anchor" href="#instructional-material"></a></h2>
 <hr class="half-width"><p>All Carpentries (Software Carpentry, Data Carpentry, and Library
 Carpentry) instructional material is made available under the <a href="https://creativecommons.org/licenses/by/4.0/" class="external-link">Creative Commons
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@@ -333,8 +333,8 @@ <h1>Licenses</h1>
 permissions necessary for your intended use. For example, other rights
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-</ul></section><section id="software"><h2 class="section-heading">Software<a class="anchor" aria-label="anchor" href="#software"></a>
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+</ul></section><section><h2 class="section-heading" id="software">Software<a class="anchor" aria-label="anchor" href="#software"></a>
+<a class="anchor" aria-label="anchor" href="#software"></a></h2>
 <hr class="half-width"><p>Except where otherwise noted, the example programs and other software
 provided by The Carpentries are made available under the <a href="https://opensource.org" class="external-link">OSI</a>-approved <a href="https://opensource.org/licenses/mit-license.html" class="external-link">MIT
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@@ -354,8 +354,8 @@ <h1>Licenses</h1>
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-</section><section id="trademark"><h2 class="section-heading">Trademark<a class="anchor" aria-label="anchor" href="#trademark"></a>
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+</section><section><h2 class="section-heading" id="trademark">Trademark<a class="anchor" aria-label="anchor" href="#trademark"></a>
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-        
+
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
-        
+
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
         <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.5" class="external-link">sandpaper (0.16.5)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.3" class="external-link">varnish (1.0.3)</a></p>
 			</div>
@@ -418,7 +418,7 @@ <h1>Licenses</h1>
   "identifier": "https://datacarpentry.github.io/sql-ecology-lesson/LICENSE.html",
   "dateCreated": "2015-02-10",
   "dateModified": "2023-04-21",
-  "datePublished": "2024-07-02"
+  "datePublished": "2024-07-09"
 }
 
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diff --git a/NEWS.html b/NEWS.html
index ca9ae2b4..ecf5c61e 100644
--- a/NEWS.html
+++ b/NEWS.html
@@ -46,7 +46,7 @@
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@@ -170,7 +170,7 @@ <h2 class="accordion-header" id="flush-headingNine">
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         <a href="03-sql-joins.html">4. Combining Data With Joins</a>
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@@ -257,10 +257,10 @@ <h2 class="accordion-header" id="flush-headingTwelve">
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             <hr class="half-width resources"><a href="aio.html">See all in one page</a>
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             <hr class="d-none d-sm-block d-md-none"><div class="d-grid gap-1">
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         <h1></h1>
         <p>Last updated on 2023-04-21 |
-        
+
         <a href="https://github.com/datacarpentry/sql-ecology-lesson/edit/main/NEWS.md" class="external-link">Edit this page <i aria-hidden="true" data-feather="edit"></i></a></p>
-        
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         </div>
 
         
-<section id="data-carpentry-sql-ecology-lesson-2017.04.0"><h2 class="section-heading">Data Carpentry SQL Ecology lesson 2017.04.0<a class="anchor" aria-label="anchor" href="#data-carpentry-sql-ecology-lesson-2017.04.0"></a>
-</h2>
+<section><h2 class="section-heading" id="data-carpentry-sql-ecology-lesson-2017-04-0">Data Carpentry SQL Ecology lesson 2017.04.0<a class="anchor" aria-label="anchor" href="#data-carpentry-sql-ecology-lesson-2017.04.0"></a>
+<a class="anchor" aria-label="anchor" href="#data-carpentry-sql-ecology-lesson-2017-04-0"></a></h2>
 <hr class="half-width"><p>Initial release of the Data Carpentry SQL Ecology lesson</p>
 </section></div> <!-- / div.lesson-content -->
     </main><!-- / main#main-content.main-content --><nav class="bottom-pagination mx-md-4" aria-label="Previous and Next Chapter"><div class="d-block d-sm-block d-md-none">
@@ -324,18 +324,18 @@ <h1></h1>
       		<footer class="row footer mx-md-3"><hr><div class="col-md-6">
         <p>This lesson is subject to the <a href="CODE_OF_CONDUCT.html">Code of Conduct</a></p>
         <p>
-        
+
         <a href="https://github.com/datacarpentry/sql-ecology-lesson/edit/main/NEWS.md" class="external-link">Edit on GitHub</a>
-        
+
 	
         | <a href="https://github.com/datacarpentry/sql-ecology-lesson/blob/main/CONTRIBUTING.md" class="external-link">Contributing</a>
         | <a href="https://github.com/datacarpentry/sql-ecology-lesson/" class="external-link">Source</a></p>
 				<p><a href="https://github.com/datacarpentry/sql-ecology-lesson/blob/main/CITATION" class="external-link">Cite</a> | <a href="mailto:team@carpentries.org">Contact</a> | <a href="https://carpentries.org/about/" class="external-link">About</a></p>
 			</div>
 			<div class="col-md-6">
-        
+
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
-        
+
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
         <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.5" class="external-link">sandpaper (0.16.5)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.3" class="external-link">varnish (1.0.3)</a></p>
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@@ -360,7 +360,7 @@ <h1></h1>
   "identifier": "https://datacarpentry.github.io/sql-ecology-lesson/NEWS.html",
   "dateCreated": "2015-02-10",
   "dateModified": "2023-04-21",
-  "datePublished": "2024-07-02"
+  "datePublished": "2024-07-09"
 }
 
   </script><script>
diff --git a/aio.html b/aio.html
index 9e09ce1f..cff84644 100644
--- a/aio.html
+++ b/aio.html
@@ -65,7 +65,7 @@
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 </li>
       </div>
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       <div class="dropdown" id="instructor-dropdown">
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           <i aria-hidden="true" class="icon" data-feather="eye"></i> Learner View <i data-feather="chevron-down"></i>
@@ -205,7 +205,7 @@ <h2 class="accordion-header" id="flush-headingNine">
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         <a href="index.html">Summary and Setup</a>
     </div>
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 </div>
@@ -239,7 +239,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
         <a href="00-sql-introduction.html">1. Introducing Databases and SQL</a>
     </div>
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@@ -275,7 +275,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
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@@ -315,11 +315,11 @@ <h2 class="accordion-header" id="flush-headingTwelve">
             </div>
             <hr class="half-width resources">
 <a href="aio.html">See all in one page</a>
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+
 
             <hr class="d-none d-sm-block d-md-none">
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@@ -340,7 +340,7 @@ <h2 class="accordion-header" id="flush-headingTwelve">
 <section id="aio-00-sql-introduction"><p>Content from <a href="00-sql-introduction.html">Introducing Databases and SQL</a></p>
 <hr>
 <p>Last updated on 2024-06-03 |
-        
+
         <a href="https://github.com/datacarpentry/sql-ecology-lesson/edit/main/episodes/00-sql-introduction.md" class="external-link">Edit this page <i aria-hidden="true" data-feather="edit"></i></a></p>
 <div class="text-end">
           <button role="button" aria-pressed="false" tabindex="0" id="expand-code" class="pull-right" data-expand="Expand All Solutions " data-collapse="Collapse All Solutions "> Expand All Solutions <i aria-hidden="true" data-feather="plus"></i></button>
@@ -383,7 +383,8 @@ <h3 id="setup">Setup<a class="anchor" aria-label="anchor" href="#setup"></a>
 Project dataset</a> throughout this lesson. See <a href="index.html#setup">Setup</a> for instructions on how to download the
 data, and also how to install DB Browser for SQLite.</p>
 </div>
-<section id="motivation"><h2 class="section-heading">Motivation<a class="anchor" aria-label="anchor" href="#motivation"></a>
+<section><h2 class="section-heading" id="motivation">Motivation<a class="anchor" aria-label="anchor" href="#motivation"></a>
+<a class="anchor" aria-label="anchor" href="#motivation"></a>
 </h2>
 <hr class="half-width">
 <p>To start, let’s orient ourselves in our project workflow. Previously,
@@ -487,7 +488,8 @@ <h3 class="callout-title">Definition: <em>Relational Database</em><a class="anch
 </div>
 </div>
 </div>
-</section><section id="databases"><h2 class="section-heading">Databases<a class="anchor" aria-label="anchor" href="#databases"></a>
+</section><section><h2 class="section-heading" id="databases">Databases<a class="anchor" aria-label="anchor" href="#databases"></a>
+<a class="anchor" aria-label="anchor" href="#databases"></a>
 </h2>
 <hr class="half-width">
 <div class="section level3">
@@ -968,7 +970,7 @@ <h3 class="callout-title">Key Points<a class="anchor" aria-label="anchor" href="
 </section></section><section id="aio-01-sql-basic-queries"><p>Content from <a href="01-sql-basic-queries.html">Accessing Data With Queries</a></p>
 <hr>
 <p>Last updated on 2023-04-21 |
-        
+
         <a href="https://github.com/datacarpentry/sql-ecology-lesson/edit/main/episodes/01-sql-basic-queries.md" class="external-link">Edit this page <i aria-hidden="true" data-feather="edit"></i></a></p>
 <div class="text-end">
           <button role="button" aria-pressed="false" tabindex="0" id="expand-code" class="pull-right" data-expand="Expand All Solutions " data-collapse="Collapse All Solutions "> Expand All Solutions <i aria-hidden="true" data-feather="plus"></i></button>
@@ -1000,7 +1002,8 @@ <h3 class="card-title">Objectives</h3>
 </div>
 </div>
 </div>
-<section id="writing-my-first-query"><h2 class="section-heading">Writing my first query<a class="anchor" aria-label="anchor" href="#writing-my-first-query"></a>
+<section><h2 class="section-heading" id="writing-my-first-query">Writing my first query<a class="anchor" aria-label="anchor" href="#writing-my-first-query"></a>
+<a class="anchor" aria-label="anchor" href="#writing-my-first-query"></a>
 </h2>
 <hr class="half-width">
 <p>Let’s start by using the <strong>surveys</strong> table. Here we have
@@ -1133,7 +1136,8 @@ <h3 class="code-label">SQL<i aria-hidden="true" data-feather="chevron-left"></i>
 </div>
 </div>
 </div>
-</section><section id="filtering"><h2 class="section-heading">Filtering<a class="anchor" aria-label="anchor" href="#filtering"></a>
+</section><section><h2 class="section-heading" id="filtering">Filtering<a class="anchor" aria-label="anchor" href="#filtering"></a>
+<a class="anchor" aria-label="anchor" href="#filtering"></a>
 </h2>
 <hr class="half-width">
 <p>Databases can also filter data – selecting only the data meeting
@@ -1214,7 +1218,8 @@ <h3 class="code-label">SQL<i aria-hidden="true" data-feather="chevron-left"></i>
 </div>
 </div>
 </div>
-</section><section id="building-more-complex-queries"><h2 class="section-heading">Building more complex queries<a class="anchor" aria-label="anchor" href="#building-more-complex-queries"></a>
+</section><section><h2 class="section-heading" id="building-more-complex-queries">Building more complex queries<a class="anchor" aria-label="anchor" href="#building-more-complex-queries"></a>
+<a class="anchor" aria-label="anchor" href="#building-more-complex-queries"></a>
 </h2>
 <hr class="half-width">
 <p>Now, let’s combine the above queries to get data for the 3
@@ -1254,7 +1259,8 @@ <h3 class="code-label">SQL<i aria-hidden="true" data-feather="chevron-left"></i>
 <p>Although SQL queries often read like plain English, it is
 <em>always</em> useful to add comments; this is especially true of more
 complex queries.</p>
-</section><section id="sorting"><h2 class="section-heading">Sorting<a class="anchor" aria-label="anchor" href="#sorting"></a>
+</section><section><h2 class="section-heading" id="sorting">Sorting<a class="anchor" aria-label="anchor" href="#sorting"></a>
+<a class="anchor" aria-label="anchor" href="#sorting"></a>
 </h2>
 <hr class="half-width">
 <p>We can also sort the results of our queries by using
@@ -1331,7 +1337,8 @@ <h3 class="code-label">SQL<i aria-hidden="true" data-feather="chevron-left"></i>
 </div>
 </div>
 </div>
-</section><section id="order-of-execution"><h2 class="section-heading">Order of execution<a class="anchor" aria-label="anchor" href="#order-of-execution"></a>
+</section><section><h2 class="section-heading" id="order-of-execution">Order of execution<a class="anchor" aria-label="anchor" href="#order-of-execution"></a>
+<a class="anchor" aria-label="anchor" href="#order-of-execution"></a>
 </h2>
 <hr class="half-width">
 <p>Another note for ordering. We don’t actually have to display a column
@@ -1433,7 +1440,7 @@ <h3 class="callout-title">Key Points<a class="anchor" aria-label="anchor" href="
 </section></section><section id="aio-02-sql-aggregation"><p>Content from <a href="02-sql-aggregation.html">Aggregating and Grouping Data</a></p>
 <hr>
 <p>Last updated on 2023-04-21 |
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         <a href="https://github.com/datacarpentry/sql-ecology-lesson/edit/main/episodes/02-sql-aggregation.md" class="external-link">Edit this page <i aria-hidden="true" data-feather="edit"></i></a></p>
 <div class="text-end">
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@@ -1471,7 +1478,8 @@ <h3 class="card-title">Objectives</h3>
 </div>
 </div>
 </div>
-<section id="count-and-group-by"><h2 class="section-heading">COUNT and GROUP BY<a class="anchor" aria-label="anchor" href="#count-and-group-by"></a>
+<section><h2 class="section-heading" id="count-and-group-by">COUNT and GROUP BY<a class="anchor" aria-label="anchor" href="#count-and-group-by"></a>
+<a class="anchor" aria-label="anchor" href="#count-and-group-by"></a>
 </h2>
 <hr class="half-width">
 <p>Aggregation allows us to combine results by grouping records based on
@@ -1607,7 +1615,8 @@ <h3 class="code-label">SQL<i aria-hidden="true" data-feather="chevron-left"></i>
 </div>
 </div>
 </div>
-</section><section id="ordering-aggregated-results"><h2 class="section-heading">Ordering Aggregated Results<a class="anchor" aria-label="anchor" href="#ordering-aggregated-results"></a>
+</section><section><h2 class="section-heading" id="ordering-aggregated-results">Ordering Aggregated Results<a class="anchor" aria-label="anchor" href="#ordering-aggregated-results"></a>
+<a class="anchor" aria-label="anchor" href="#ordering-aggregated-results"></a>
 </h2>
 <hr class="half-width">
 <p>We can order the results of our aggregation by a specific column,
@@ -1621,7 +1630,8 @@ <h3 class="code-label">SQL<i aria-hidden="true" data-feather="chevron-left"></i>
 <span id="cb8-3"><a href="#cb8-3" tabindex="-1"></a><span class="kw">GROUP</span> <span class="kw">BY</span> species_id</span>
 <span id="cb8-4"><a href="#cb8-4" tabindex="-1"></a><span class="kw">ORDER</span> <span class="kw">BY</span> <span class="fu">COUNT</span>(species_id);</span></code></pre>
 </div>
-</section><section id="aliases"><h2 class="section-heading">Aliases<a class="anchor" aria-label="anchor" href="#aliases"></a>
+</section><section><h2 class="section-heading" id="aliases">Aliases<a class="anchor" aria-label="anchor" href="#aliases"></a>
+<a class="anchor" aria-label="anchor" href="#aliases"></a>
 </h2>
 <hr class="half-width">
 <p>As queries get more complex, the expressions we use can get long and
@@ -1661,7 +1671,8 @@ <h3 class="code-label">SQL<i aria-hidden="true" data-feather="chevron-left"></i>
 </div>
 <p>Aliasing table names can be helpful when working with queries that
 involve multiple tables; you will learn more about this later.</p>
-</section><section id="the-having-keyword"><h2 class="section-heading">The <code>HAVING</code> keyword<a class="anchor" aria-label="anchor" href="#the-having-keyword"></a>
+</section><section><h2 class="section-heading" id="the-having-keyword">The <code>HAVING</code> keyword<a class="anchor" aria-label="anchor" href="#the-having-keyword"></a>
+<a class="anchor" aria-label="anchor" href="#the-having-keyword"></a>
 </h2>
 <hr class="half-width">
 <p>In the previous episode, we have seen the keyword <code>WHERE</code>,
@@ -1733,7 +1744,8 @@ <h3 class="code-label">SQL<i aria-hidden="true" data-feather="chevron-left"></i>
 </div>
 </div>
 </div>
-</section><section id="saving-queries-for-future-use"><h2 class="section-heading">Saving Queries for Future Use<a class="anchor" aria-label="anchor" href="#saving-queries-for-future-use"></a>
+</section><section><h2 class="section-heading" id="saving-queries-for-future-use">Saving Queries for Future Use<a class="anchor" aria-label="anchor" href="#saving-queries-for-future-use"></a>
+<a class="anchor" aria-label="anchor" href="#saving-queries-for-future-use"></a>
 </h2>
 <hr class="half-width">
 <p>It is not uncommon to repeat the same operation more than once, for
@@ -1774,7 +1786,8 @@ <h3 class="code-label">SQL<i aria-hidden="true" data-feather="chevron-left"></i>
 <span id="cb18-2"><a href="#cb18-2" tabindex="-1"></a><span class="kw">FROM</span> summer_2000</span>
 <span id="cb18-3"><a href="#cb18-3" tabindex="-1"></a><span class="kw">WHERE</span> species_id <span class="op">=</span> <span class="st">'PE'</span>;</span></code></pre>
 </div>
-</section><section id="what-about-null"><h2 class="section-heading">What About NULL?<a class="anchor" aria-label="anchor" href="#what-about-null"></a>
+</section><section><h2 class="section-heading" id="what-about-null">What About NULL?<a class="anchor" aria-label="anchor" href="#what-about-null"></a>
+<a class="anchor" aria-label="anchor" href="#what-about-null"></a>
 </h2>
 <hr class="half-width">
 <p>From the last example, there should only be five records. If you look
@@ -1877,7 +1890,7 @@ <h3 class="callout-title">Key Points<a class="anchor" aria-label="anchor" href="
 </section></section><section id="aio-03-sql-joins"><p>Content from <a href="03-sql-joins.html">Combining Data With Joins</a></p>
 <hr>
 <p>Last updated on 2024-06-03 |
-        
+
         <a href="https://github.com/datacarpentry/sql-ecology-lesson/edit/main/episodes/03-sql-joins.md" class="external-link">Edit this page <i aria-hidden="true" data-feather="edit"></i></a></p>
 <div class="text-end">
           <button role="button" aria-pressed="false" tabindex="0" id="expand-code" class="pull-right" data-expand="Expand All Solutions " data-collapse="Collapse All Solutions "> Expand All Solutions <i aria-hidden="true" data-feather="plus"></i></button>
@@ -1910,7 +1923,8 @@ <h3 class="card-title">Objectives</h3>
 </div>
 </div>
 </div>
-<section id="joins"><h2 class="section-heading">Joins<a class="anchor" aria-label="anchor" href="#joins"></a>
+<section><h2 class="section-heading" id="joins">Joins<a class="anchor" aria-label="anchor" href="#joins"></a>
+<a class="anchor" aria-label="anchor" href="#joins"></a>
 </h2>
 <hr class="half-width">
 <p>To combine data from two tables we use an SQL <code>JOIN</code>
@@ -2414,8 +2428,9 @@ <h3 class="code-label">SQL<i aria-hidden="true" data-feather="chevron-left"></i>
 </div>
 </div>
 </div>
-</section><section id="functions-coalesce-and-nullif-and-more"><h2 class="section-heading">Functions <code>COALESCE</code> and <code>NULLIF</code> and
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@@ -315,11 +315,11 @@ <h2 class="accordion-header" id="flush-headingTwelve">
             </div>
             <hr class="half-width resources">
 <a href="aio.html">See all in one page</a>
-            
+
 
             <hr class="d-none d-sm-block d-md-none">
 <div class="d-grid gap-1">
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+
             </div>
           </div>
 <!-- /div.accordion -->
@@ -338,7 +338,8 @@ <h2 class="accordion-header" id="flush-headingTwelve">
         <h1>Instructor Notes</h1>
         
 
-<section id="learning-objectives"><h2 class="section-heading">Learning objectives<a class="anchor" aria-label="anchor" href="#learning-objectives"></a>
+<section><h2 class="section-heading" id="learning-objectives">Learning objectives<a class="anchor" aria-label="anchor" href="#learning-objectives"></a>
+<a class="anchor" aria-label="anchor" href="#learning-objectives"></a>
 </h2>
 <hr class="half-width">
 <ul>
@@ -347,7 +348,8 @@ <h1>Instructor Notes</h1>
 <li>Understand how to filter and sort results from a query</li>
 <li>Use aggregate functions to combine data</li>
 <li>Perform queries across tables</li>
-</ul></section><section id="data"><h2 class="section-heading">Data<a class="anchor" aria-label="anchor" href="#data"></a>
+</ul></section><section><h2 class="section-heading" id="data">Data<a class="anchor" aria-label="anchor" href="#data"></a>
+<a class="anchor" aria-label="anchor" href="#data"></a>
 </h2>
 <hr class="half-width">
 <p>As for all of the <a href="https://github.com/datacarpentry?utf8=%E2%9C%93&amp;query=ecology" class="external-link">Data
@@ -360,7 +362,8 @@ <h1>Instructor Notes</h1>
 <p><strong>Note</strong> that the figshare download is an archive (.zip)
 file that rudely explodes all of the files into your current
 directory.</p>
-</section><section id="motivation-and-framing"><h2 class="section-heading">Motivation and Framing<a class="anchor" aria-label="anchor" href="#motivation-and-framing"></a>
+</section><section><h2 class="section-heading" id="motivation-and-framing">Motivation and Framing<a class="anchor" aria-label="anchor" href="#motivation-and-framing"></a>
+<a class="anchor" aria-label="anchor" href="#motivation-and-framing"></a>
 </h2>
 <hr class="half-width">
 <p>See this slide deck as a sample intro for the lesson: <a href="https://speakerdeck.com/christinalk/data-carpentry-sql-introduction" class="external-link">SQL
@@ -376,7 +379,8 @@ <h1>Instructor Notes</h1>
 data -&gt; clean data -&gt; import and analyze -&gt; results -&gt;
 visualization), it can be helpful to identify that you’re now somewhere
 between clean data and analysis.</p>
-</section><section id="common-difficult-concepts"><h2 class="section-heading">Common Difficult Concepts<a class="anchor" aria-label="anchor" href="#common-difficult-concepts"></a>
+</section><section><h2 class="section-heading" id="common-difficult-concepts">Common Difficult Concepts<a class="anchor" aria-label="anchor" href="#common-difficult-concepts"></a>
+<a class="anchor" aria-label="anchor" href="#common-difficult-concepts"></a>
 </h2>
 <hr class="half-width">
 <ul>
@@ -401,7 +405,8 @@ <h1>Instructor Notes</h1>
 especially when they’re from a totally different domain</li>
 <li>How NULLs behave in different circumstances (when did a NULL change
 your result and how do you know?)</li>
-</ul></section><section id="lesson-outline"><h2 class="section-heading">Lesson outline<a class="anchor" aria-label="anchor" href="#lesson-outline"></a>
+</ul></section><section><h2 class="section-heading" id="lesson-outline">Lesson outline<a class="anchor" aria-label="anchor" href="#lesson-outline"></a>
+<a class="anchor" aria-label="anchor" href="#lesson-outline"></a>
 </h2>
 <hr class="half-width">
 <div class="section level3">
@@ -459,7 +464,8 @@ <h3 id="sql-joins-aliases">03-sql-joins-aliases<a class="anchor" aria-label="anc
 <li>using aliases with AS to simplify queries</li>
 </ul>
 </div>
-</section><section id="alternative-activities"><h2 class="section-heading">Alternative activities<a class="anchor" aria-label="anchor" href="#alternative-activities"></a>
+</section><section><h2 class="section-heading" id="alternative-activities">Alternative activities<a class="anchor" aria-label="anchor" href="#alternative-activities"></a>
+<a class="anchor" aria-label="anchor" href="#alternative-activities"></a>
 </h2>
 <hr class="half-width">
 <div class="section level3">
@@ -574,7 +580,8 @@ <h3 id="interactive-database">“Interactive” database<a class="anchor" aria-l
 </li>
 </ul>
 </div>
-</section><section id="exercise-solutions"><h2 class="section-heading">Exercise Solutions<a class="anchor" aria-label="anchor" href="#exercise-solutions"></a>
+</section><section><h2 class="section-heading" id="exercise-solutions">Exercise Solutions<a class="anchor" aria-label="anchor" href="#exercise-solutions"></a>
+<a class="anchor" aria-label="anchor" href="#exercise-solutions"></a>
 </h2>
 <hr class="half-width">
 <div class="section level5">
@@ -688,18 +695,18 @@ <h5 id="warning">WARNING<a class="anchor" aria-label="anchor" href="#warning"></
 <div class="col-md-6">
         <p>This lesson is subject to the <a href="CODE_OF_CONDUCT.html">Code of Conduct</a></p>
         <p>
-        
+
         <a href="https://github.com/datacarpentry/sql-ecology-lesson/edit/main/README.md" class="external-link">Edit on GitHub</a>
-        
+
 	
         | <a href="https://github.com/datacarpentry/sql-ecology-lesson/blob/main/CONTRIBUTING.md" class="external-link">Contributing</a>
         | <a href="https://github.com/datacarpentry/sql-ecology-lesson/" class="external-link">Source</a></p>
 				<p><a href="https://github.com/datacarpentry/sql-ecology-lesson/blob/main/CITATION" class="external-link">Cite</a> | <a href="mailto:team@carpentries.org">Contact</a> | <a href="https://carpentries.org/about/" class="external-link">About</a></p>
 			</div>
 			<div class="col-md-6">
-        
+
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
-        
+
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
         <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.5" class="external-link">sandpaper (0.16.5)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.3" class="external-link">varnish (1.0.3)</a></p>
 			</div>
@@ -724,8 +731,8 @@ <h5 id="warning">WARNING<a class="anchor" aria-label="anchor" href="#warning"></
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   "identifier": "https://datacarpentry.github.io/sql-ecology-lesson/instructor-notes.html",
   "dateCreated": "2015-02-10",
-  "dateModified": "2024-07-02",
-  "datePublished": "2024-07-02"
+  "dateModified": "2024-07-09",
+  "datePublished": "2024-07-09"
 }
 
   </script><script>
diff --git a/instructor/00-sql-introduction.html b/instructor/00-sql-introduction.html
index 74266493..c7375f17 100644
--- a/instructor/00-sql-introduction.html
+++ b/instructor/00-sql-introduction.html
@@ -46,7 +46,7 @@
             </li>
           </ul></li>
       </div>
-      
+
       <div class="dropdown" id="instructor-dropdown">
         <button class="btn btn-secondary dropdown-toggle bordered-button" type="button" id="dropdownMenu1" data-bs-toggle="dropdown" aria-expanded="false">
           <i aria-hidden="true" class="icon" data-feather="eye"></i> Instructor View <i data-feather="chevron-down"></i>
@@ -170,7 +170,7 @@ <h2 class="accordion-header" id="flush-headingNine">
                 </div><!--/div.accordion-flush-->
               </div><!--div.sidenav-view-selector -->
             </div><!--/div.col -->
-      
+
             <hr></div><!--/div.mobile-row -->
 
           <div class="accordion accordion-flush" id="accordionFlush11">
@@ -189,7 +189,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
     <div class="accordion-header" id="flush-heading1">
         <a href="index.html">Summary and Schedule</a>
     </div><!--/div.accordion-header-->
-        
+
   </div><!--/div.accordion-item-->
 </div><!--/div.accordion-flush-->
 
@@ -203,14 +203,14 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
         </span>
       </button>
     </div><!--/div.accordion-header-->
-        
+
     <div id="flush-collapsecurrent" class="accordion-collapse collapse show" aria-labelledby="flush-headingcurrent" data-bs-parent="#accordionFlushcurrent">
       <div class="accordion-body">
         <ul><li><a href="#motivation">Motivation</a></li>
 <li><a href="#databases">Databases</a></li>
         </ul></div><!--/div.accordion-body-->
     </div><!--/div.accordion-collapse-->
-        
+
   </div><!--/div.accordion-item-->
 </div><!--/div.accordion-flush-->
 
@@ -219,7 +219,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
     <div class="accordion-header" id="flush-heading3">
         <a href="01-sql-basic-queries.html">2. Accessing Data With Queries</a>
     </div><!--/div.accordion-header-->
-        
+
   </div><!--/div.accordion-item-->
 </div><!--/div.accordion-flush-->
 
@@ -228,7 +228,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
     <div class="accordion-header" id="flush-heading4">
         <a href="02-sql-aggregation.html">3. Aggregating and Grouping Data</a>
     </div><!--/div.accordion-header-->
-        
+
   </div><!--/div.accordion-item-->
 </div><!--/div.accordion-flush-->
 
@@ -237,7 +237,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
     <div class="accordion-header" id="flush-heading5">
         <a href="03-sql-joins.html">4. Combining Data With Joins</a>
     </div><!--/div.accordion-header-->
-        
+
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 </div><!--/div.accordion-flush-->
 
@@ -269,10 +269,10 @@ <h2 class="accordion-header" id="flush-headingTwelve">
               </div>
             </div>
             <hr class="half-width resources"><a href="../instructor/aio.html">See all in one page</a>
-            
+
 
             <hr class="d-none d-sm-block d-md-none"><div class="d-grid gap-1">
-            
+
             </div>
           </div><!-- /div.accordion -->
         </div><!-- /div.sidebar-inner -->
@@ -293,20 +293,20 @@ <h2 class="accordion-header" id="flush-headingTwelve">
           Home
         </a>
         <a class="chapter-link float-end" href="../instructor/01-sql-basic-queries.html" rel="next">
-          Next: Accessing Data With... 
+          Next: Accessing Data With...
           <i aria-hidden="true" class="small-arrow" data-feather="arrow-right"></i>
         </a>
       </div>
       <hr></nav><main id="main-content" class="main-content"><div class="container lesson-content">
         <h1>Introducing Databases and SQL</h1>
         <p>Last updated on 2024-06-03 |
-        
+
         <a href="https://github.com/datacarpentry/sql-ecology-lesson/edit/main/episodes/00-sql-introduction.md" class="external-link">Edit this page <i aria-hidden="true" data-feather="edit"></i></a></p>
-        
-        
-        
+
+
+
         <p>Estimated time: <i aria-hidden="true" data-feather="clock"></i> 65 minutes</p>
-        
+
         <div class="text-end">
           <button role="button" aria-pressed="false" tabindex="0" id="expand-code" class="pull-right" data-expand="Expand All Solutions " data-collapse="Collapse All Solutions "> Expand All Solutions <i aria-hidden="true" data-feather="plus"></i></button>
         </div>
@@ -346,8 +346,8 @@ <h3 id="setup">Setup<a class="anchor" aria-label="anchor" href="#setup"></a></h3
 Project dataset</a> throughout this lesson. See <a href="index.html#setup">Setup</a> for instructions on how to download the
 data, and also how to install DB Browser for SQLite.</p>
 </div>
-<section id="motivation"><h2 class="section-heading">Motivation<a class="anchor" aria-label="anchor" href="#motivation"></a>
-</h2>
+<section><h2 class="section-heading" id="motivation">Motivation<a class="anchor" aria-label="anchor" href="#motivation"></a>
+<a class="anchor" aria-label="anchor" href="#motivation"></a></h2>
 <hr class="half-width"><p>To start, let’s orient ourselves in our project workflow. Previously,
 we used Excel and OpenRefine to go from messy, human created data to
 cleaned, computer-readable data. Now we’re going to move to the next
@@ -439,8 +439,8 @@ <h3 class="callout-title">Definition: <em>Relational Database</em><a class="anch
 </div>
 </div>
 </div>
-</section><section id="databases"><h2 class="section-heading">Databases<a class="anchor" aria-label="anchor" href="#databases"></a>
-</h2>
+</section><section><h2 class="section-heading" id="databases">Databases<a class="anchor" aria-label="anchor" href="#databases"></a>
+<a class="anchor" aria-label="anchor" href="#databases"></a></h2>
 <hr class="half-width"><div class="section level3">
 <h3 id="why-use-relational-databases">Why use relational databases<a class="anchor" aria-label="anchor" href="#why-use-relational-databases"></a></h3>
 <p>Using a relational database serves several purposes.</p>
@@ -778,7 +778,7 @@ <h3 class="callout-title">Key Points<a class="anchor" aria-label="anchor" href="
           Home
         </a>
         <a class="chapter-link float-end" href="../instructor/01-sql-basic-queries.html" rel="next">
-          Next: Accessing Data With... 
+          Next: Accessing Data With...
           <i aria-hidden="true" class="small-arrow" data-feather="arrow-right"></i>
         </a>
       </div>
@@ -789,18 +789,18 @@ <h3 class="callout-title">Key Points<a class="anchor" aria-label="anchor" href="
       		<footer class="row footer mx-md-3"><hr><div class="col-md-6">
         <p>This lesson is subject to the <a href="CODE_OF_CONDUCT.html">Code of Conduct</a></p>
         <p>
-        
+
         <a href="https://github.com/datacarpentry/sql-ecology-lesson/edit/main/episodes/00-sql-introduction.md" class="external-link">Edit on GitHub</a>
-        
+
 	
         | <a href="https://github.com/datacarpentry/sql-ecology-lesson/blob/main/CONTRIBUTING.md" class="external-link">Contributing</a>
         | <a href="https://github.com/datacarpentry/sql-ecology-lesson/" class="external-link">Source</a></p>
 				<p><a href="https://github.com/datacarpentry/sql-ecology-lesson/blob/main/CITATION" class="external-link">Cite</a> | <a href="mailto:team@carpentries.org">Contact</a> | <a href="https://carpentries.org/about/" class="external-link">About</a></p>
 			</div>
 			<div class="col-md-6">
-        
+
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
-        
+
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
         <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.5" class="external-link">sandpaper (0.16.5)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.3" class="external-link">varnish (1.0.3)</a></p>
 			</div>
@@ -825,7 +825,7 @@ <h3 class="callout-title">Key Points<a class="anchor" aria-label="anchor" href="
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   "dateCreated": "2015-02-10",
   "dateModified": "2024-06-03",
-  "datePublished": "2024-07-02"
+  "datePublished": "2024-07-09"
 }
 
   </script><script>
diff --git a/instructor/01-sql-basic-queries.html b/instructor/01-sql-basic-queries.html
index 974603fc..cec5749c 100644
--- a/instructor/01-sql-basic-queries.html
+++ b/instructor/01-sql-basic-queries.html
@@ -46,7 +46,7 @@
             </li>
           </ul></li>
       </div>
-      
+
       <div class="dropdown" id="instructor-dropdown">
         <button class="btn btn-secondary dropdown-toggle bordered-button" type="button" id="dropdownMenu1" data-bs-toggle="dropdown" aria-expanded="false">
           <i aria-hidden="true" class="icon" data-feather="eye"></i> Instructor View <i data-feather="chevron-down"></i>
@@ -170,7 +170,7 @@ <h2 class="accordion-header" id="flush-headingNine">
                 </div><!--/div.accordion-flush-->
               </div><!--div.sidenav-view-selector -->
             </div><!--/div.col -->
-      
+
             <hr></div><!--/div.mobile-row -->
 
           <div class="accordion accordion-flush" id="accordionFlush11">
@@ -189,7 +189,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
     <div class="accordion-header" id="flush-heading1">
         <a href="index.html">Summary and Schedule</a>
     </div><!--/div.accordion-header-->
-        
+
   </div><!--/div.accordion-item-->
 </div><!--/div.accordion-flush-->
 
@@ -198,7 +198,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
     <div class="accordion-header" id="flush-heading2">
         <a href="00-sql-introduction.html">1. Introducing Databases and SQL</a>
     </div><!--/div.accordion-header-->
-        
+
   </div><!--/div.accordion-item-->
 </div><!--/div.accordion-flush-->
 
@@ -212,7 +212,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
         </span>
       </button>
     </div><!--/div.accordion-header-->
-        
+
     <div id="flush-collapsecurrent" class="accordion-collapse collapse show" aria-labelledby="flush-headingcurrent" data-bs-parent="#accordionFlushcurrent">
       <div class="accordion-body">
         <ul><li><a href="#writing-my-first-query">Writing my first query</a></li>
@@ -222,7 +222,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
 <li><a href="#order-of-execution">Order of execution</a></li>
         </ul></div><!--/div.accordion-body-->
     </div><!--/div.accordion-collapse-->
-        
+
   </div><!--/div.accordion-item-->
 </div><!--/div.accordion-flush-->
 
@@ -231,7 +231,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
     <div class="accordion-header" id="flush-heading4">
         <a href="02-sql-aggregation.html">3. Aggregating and Grouping Data</a>
     </div><!--/div.accordion-header-->
-        
+
   </div><!--/div.accordion-item-->
 </div><!--/div.accordion-flush-->
 
@@ -240,7 +240,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
     <div class="accordion-header" id="flush-heading5">
         <a href="03-sql-joins.html">4. Combining Data With Joins</a>
     </div><!--/div.accordion-header-->
-        
+
   </div><!--/div.accordion-item-->
 </div><!--/div.accordion-flush-->
 
@@ -272,10 +272,10 @@ <h2 class="accordion-header" id="flush-headingTwelve">
               </div>
             </div>
             <hr class="half-width resources"><a href="../instructor/aio.html">See all in one page</a>
-            
+
 
             <hr class="d-none d-sm-block d-md-none"><div class="d-grid gap-1">
-            
+
             </div>
           </div><!-- /div.accordion -->
         </div><!-- /div.sidebar-inner -->
@@ -296,20 +296,20 @@ <h2 class="accordion-header" id="flush-headingTwelve">
           Previous: Introducing
         </a>
         <a class="chapter-link float-end" href="../instructor/02-sql-aggregation.html" rel="next">
-          Next: Aggregating and... 
+          Next: Aggregating and...
           <i aria-hidden="true" class="small-arrow" data-feather="arrow-right"></i>
         </a>
       </div>
       <hr></nav><main id="main-content" class="main-content"><div class="container lesson-content">
         <h1>Accessing Data With Queries</h1>
         <p>Last updated on 2023-04-21 |
-        
+
         <a href="https://github.com/datacarpentry/sql-ecology-lesson/edit/main/episodes/01-sql-basic-queries.md" class="external-link">Edit this page <i aria-hidden="true" data-feather="edit"></i></a></p>
-        
-        
-        
+
+
+
         <p>Estimated time: <i aria-hidden="true" data-feather="clock"></i> 35 minutes</p>
-        
+
         <div class="text-end">
           <button role="button" aria-pressed="false" tabindex="0" id="expand-code" class="pull-right" data-expand="Expand All Solutions " data-collapse="Collapse All Solutions "> Expand All Solutions <i aria-hidden="true" data-feather="plus"></i></button>
         </div>
@@ -339,8 +339,8 @@ <h3 class="card-title">Objectives</h3>
 </div>
 </div>
 </div>
-<section id="writing-my-first-query"><h2 class="section-heading">Writing my first query<a class="anchor" aria-label="anchor" href="#writing-my-first-query"></a>
-</h2>
+<section><h2 class="section-heading" id="writing-my-first-query">Writing my first query<a class="anchor" aria-label="anchor" href="#writing-my-first-query"></a>
+<a class="anchor" aria-label="anchor" href="#writing-my-first-query"></a></h2>
 <hr class="half-width"><p>Let’s start by using the <strong>surveys</strong> table. Here we have
 data on every individual that was captured at the site, including when
 they were captured, what plot they were captured on, their species ID,
@@ -466,8 +466,8 @@ <h3 class="code-label">SQL<i aria-hidden="true" data-feather="chevron-left"></i>
 </div>
 </div>
 </div>
-</section><section id="filtering"><h2 class="section-heading">Filtering<a class="anchor" aria-label="anchor" href="#filtering"></a>
-</h2>
+</section><section><h2 class="section-heading" id="filtering">Filtering<a class="anchor" aria-label="anchor" href="#filtering"></a>
+<a class="anchor" aria-label="anchor" href="#filtering"></a></h2>
 <hr class="half-width"><p>Databases can also filter data – selecting only the data meeting
 certain criteria. For example, let’s say we only want data for the
 species <em>Dipodomys merriami</em>, which has a species code of DM. We
@@ -544,8 +544,8 @@ <h3 class="code-label">SQL<i aria-hidden="true" data-feather="chevron-left"></i>
 </div>
 </div>
 </div>
-</section><section id="building-more-complex-queries"><h2 class="section-heading">Building more complex queries<a class="anchor" aria-label="anchor" href="#building-more-complex-queries"></a>
-</h2>
+</section><section><h2 class="section-heading" id="building-more-complex-queries">Building more complex queries<a class="anchor" aria-label="anchor" href="#building-more-complex-queries"></a>
+<a class="anchor" aria-label="anchor" href="#building-more-complex-queries"></a></h2>
 <hr class="half-width"><p>Now, let’s combine the above queries to get data for the 3
 <em>Dipodomys</em> species from the year 2000 on. This time, let’s use
 IN as one way to make the query easier to understand. It is equivalent
@@ -583,8 +583,8 @@ <h3 class="code-label">SQL<i aria-hidden="true" data-feather="chevron-left"></i>
 <p>Although SQL queries often read like plain English, it is
 <em>always</em> useful to add comments; this is especially true of more
 complex queries.</p>
-</section><section id="sorting"><h2 class="section-heading">Sorting<a class="anchor" aria-label="anchor" href="#sorting"></a>
-</h2>
+</section><section><h2 class="section-heading" id="sorting">Sorting<a class="anchor" aria-label="anchor" href="#sorting"></a>
+<a class="anchor" aria-label="anchor" href="#sorting"></a></h2>
 <hr class="half-width"><p>We can also sort the results of our queries by using
 <code>ORDER BY</code>. For simplicity, let’s go back to the
 <strong>species</strong> table and alphabetize it by taxa.</p>
@@ -657,8 +657,8 @@ <h3 class="code-label">SQL<i aria-hidden="true" data-feather="chevron-left"></i>
 </div>
 </div>
 </div>
-</section><section id="order-of-execution"><h2 class="section-heading">Order of execution<a class="anchor" aria-label="anchor" href="#order-of-execution"></a>
-</h2>
+</section><section><h2 class="section-heading" id="order-of-execution">Order of execution<a class="anchor" aria-label="anchor" href="#order-of-execution"></a>
+<a class="anchor" aria-label="anchor" href="#order-of-execution"></a></h2>
 <hr class="half-width"><p>Another note for ordering. We don’t actually have to display a column
 to sort by it. For example, let’s say we want to order the birds by
 their species ID, but we only want to see genus and species.</p>
@@ -761,7 +761,7 @@ <h3 class="callout-title">Key Points<a class="anchor" aria-label="anchor" href="
           Previous: Introducing
         </a>
         <a class="chapter-link float-end" href="../instructor/02-sql-aggregation.html" rel="next">
-          Next: Aggregating and... 
+          Next: Aggregating and...
           <i aria-hidden="true" class="small-arrow" data-feather="arrow-right"></i>
         </a>
       </div>
@@ -772,18 +772,18 @@ <h3 class="callout-title">Key Points<a class="anchor" aria-label="anchor" href="
       		<footer class="row footer mx-md-3"><hr><div class="col-md-6">
         <p>This lesson is subject to the <a href="CODE_OF_CONDUCT.html">Code of Conduct</a></p>
         <p>
-        
+
         <a href="https://github.com/datacarpentry/sql-ecology-lesson/edit/main/episodes/01-sql-basic-queries.md" class="external-link">Edit on GitHub</a>
-        
+
 	
         | <a href="https://github.com/datacarpentry/sql-ecology-lesson/blob/main/CONTRIBUTING.md" class="external-link">Contributing</a>
         | <a href="https://github.com/datacarpentry/sql-ecology-lesson/" class="external-link">Source</a></p>
 				<p><a href="https://github.com/datacarpentry/sql-ecology-lesson/blob/main/CITATION" class="external-link">Cite</a> | <a href="mailto:team@carpentries.org">Contact</a> | <a href="https://carpentries.org/about/" class="external-link">About</a></p>
 			</div>
 			<div class="col-md-6">
-        
+
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
-        
+
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
         <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.5" class="external-link">sandpaper (0.16.5)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.3" class="external-link">varnish (1.0.3)</a></p>
 			</div>
@@ -808,7 +808,7 @@ <h3 class="callout-title">Key Points<a class="anchor" aria-label="anchor" href="
   "identifier": "https://datacarpentry.github.io/sql-ecology-lesson/instructor/01-sql-basic-queries.html",
   "dateCreated": "2015-02-10",
   "dateModified": "2023-04-21",
-  "datePublished": "2024-07-02"
+  "datePublished": "2024-07-09"
 }
 
   </script><script>
diff --git a/instructor/02-sql-aggregation.html b/instructor/02-sql-aggregation.html
index 7bc9a3b3..953a65ab 100644
--- a/instructor/02-sql-aggregation.html
+++ b/instructor/02-sql-aggregation.html
@@ -46,7 +46,7 @@
             </li>
           </ul></li>
       </div>
-      
+
       <div class="dropdown" id="instructor-dropdown">
         <button class="btn btn-secondary dropdown-toggle bordered-button" type="button" id="dropdownMenu1" data-bs-toggle="dropdown" aria-expanded="false">
           <i aria-hidden="true" class="icon" data-feather="eye"></i> Instructor View <i data-feather="chevron-down"></i>
@@ -170,7 +170,7 @@ <h2 class="accordion-header" id="flush-headingNine">
                 </div><!--/div.accordion-flush-->
               </div><!--div.sidenav-view-selector -->
             </div><!--/div.col -->
-      
+
             <hr></div><!--/div.mobile-row -->
 
           <div class="accordion accordion-flush" id="accordionFlush11">
@@ -189,7 +189,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
     <div class="accordion-header" id="flush-heading1">
         <a href="index.html">Summary and Schedule</a>
     </div><!--/div.accordion-header-->
-        
+
   </div><!--/div.accordion-item-->
 </div><!--/div.accordion-flush-->
 
@@ -198,7 +198,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
     <div class="accordion-header" id="flush-heading2">
         <a href="00-sql-introduction.html">1. Introducing Databases and SQL</a>
     </div><!--/div.accordion-header-->
-        
+
   </div><!--/div.accordion-item-->
 </div><!--/div.accordion-flush-->
 
@@ -207,7 +207,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
     <div class="accordion-header" id="flush-heading3">
         <a href="01-sql-basic-queries.html">2. Accessing Data With Queries</a>
     </div><!--/div.accordion-header-->
-        
+
   </div><!--/div.accordion-item-->
 </div><!--/div.accordion-flush-->
 
@@ -221,7 +221,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
         </span>
       </button>
     </div><!--/div.accordion-header-->
-        
+
     <div id="flush-collapsecurrent" class="accordion-collapse collapse show" aria-labelledby="flush-headingcurrent" data-bs-parent="#accordionFlushcurrent">
       <div class="accordion-body">
         <ul><li><a href="#count-and-group-by">COUNT and GROUP BY</a></li>
@@ -232,7 +232,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
 <li><a href="#what-about-null">What About NULL?</a></li>
         </ul></div><!--/div.accordion-body-->
     </div><!--/div.accordion-collapse-->
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+
   </div><!--/div.accordion-item-->
 </div><!--/div.accordion-flush-->
 
@@ -241,7 +241,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
     <div class="accordion-header" id="flush-heading5">
         <a href="03-sql-joins.html">4. Combining Data With Joins</a>
     </div><!--/div.accordion-header-->
-        
+
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 </div><!--/div.accordion-flush-->
 
@@ -273,10 +273,10 @@ <h2 class="accordion-header" id="flush-headingTwelve">
               </div>
             </div>
             <hr class="half-width resources"><a href="../instructor/aio.html">See all in one page</a>
-            
+
 
             <hr class="d-none d-sm-block d-md-none"><div class="d-grid gap-1">
-            
+
             </div>
           </div><!-- /div.accordion -->
         </div><!-- /div.sidebar-inner -->
@@ -297,20 +297,20 @@ <h2 class="accordion-header" id="flush-headingTwelve">
           Previous: Accessing Data With
         </a>
         <a class="chapter-link float-end" href="../instructor/03-sql-joins.html" rel="next">
-          Next: Combining Data With... 
+          Next: Combining Data With...
           <i aria-hidden="true" class="small-arrow" data-feather="arrow-right"></i>
         </a>
       </div>
       <hr></nav><main id="main-content" class="main-content"><div class="container lesson-content">
         <h1>Aggregating and Grouping Data</h1>
         <p>Last updated on 2023-04-21 |
-        
+
         <a href="https://github.com/datacarpentry/sql-ecology-lesson/edit/main/episodes/02-sql-aggregation.md" class="external-link">Edit this page <i aria-hidden="true" data-feather="edit"></i></a></p>
-        
-        
-        
+
+
+
         <p>Estimated time: <i aria-hidden="true" data-feather="clock"></i> 60 minutes</p>
-        
+
         <div class="text-end">
           <button role="button" aria-pressed="false" tabindex="0" id="expand-code" class="pull-right" data-expand="Expand All Solutions " data-collapse="Collapse All Solutions "> Expand All Solutions <i aria-hidden="true" data-feather="plus"></i></button>
         </div>
@@ -346,8 +346,8 @@ <h3 class="card-title">Objectives</h3>
 </div>
 </div>
 </div>
-<section id="count-and-group-by"><h2 class="section-heading">COUNT and GROUP BY<a class="anchor" aria-label="anchor" href="#count-and-group-by"></a>
-</h2>
+<section><h2 class="section-heading" id="count-and-group-by">COUNT and GROUP BY<a class="anchor" aria-label="anchor" href="#count-and-group-by"></a>
+<a class="anchor" aria-label="anchor" href="#count-and-group-by"></a></h2>
 <hr class="half-width"><p>Aggregation allows us to combine results by grouping records based on
 value. It is also useful for calculating combined values in groups.</p>
 <p>Let’s go to the surveys table and find out how many individuals there
@@ -479,8 +479,8 @@ <h3 class="code-label">SQL<i aria-hidden="true" data-feather="chevron-left"></i>
 </div>
 </div>
 </div>
-</section><section id="ordering-aggregated-results"><h2 class="section-heading">Ordering Aggregated Results<a class="anchor" aria-label="anchor" href="#ordering-aggregated-results"></a>
-</h2>
+</section><section><h2 class="section-heading" id="ordering-aggregated-results">Ordering Aggregated Results<a class="anchor" aria-label="anchor" href="#ordering-aggregated-results"></a>
+<a class="anchor" aria-label="anchor" href="#ordering-aggregated-results"></a></h2>
 <hr class="half-width"><p>We can order the results of our aggregation by a specific column,
 including the aggregated column. Let’s count the number of individuals
 of each species captured, ordered by the count:</p>
@@ -492,8 +492,8 @@ <h3 class="code-label">SQL<i aria-hidden="true" data-feather="chevron-left"></i>
 <span id="cb8-3"><a href="#cb8-3" tabindex="-1"></a><span class="kw">GROUP</span> <span class="kw">BY</span> species_id</span>
 <span id="cb8-4"><a href="#cb8-4" tabindex="-1"></a><span class="kw">ORDER</span> <span class="kw">BY</span> <span class="fu">COUNT</span>(species_id);</span></code></pre>
 </div>
-</section><section id="aliases"><h2 class="section-heading">Aliases<a class="anchor" aria-label="anchor" href="#aliases"></a>
-</h2>
+</section><section><h2 class="section-heading" id="aliases">Aliases<a class="anchor" aria-label="anchor" href="#aliases"></a>
+<a class="anchor" aria-label="anchor" href="#aliases"></a></h2>
 <hr class="half-width"><p>As queries get more complex, the expressions we use can get long and
 unwieldy. To help make things clearer in the query and in its output, we
 can use aliases to assign new names to things in the query.</p>
@@ -531,8 +531,8 @@ <h3 class="code-label">SQL<i aria-hidden="true" data-feather="chevron-left"></i>
 </div>
 <p>Aliasing table names can be helpful when working with queries that
 involve multiple tables; you will learn more about this later.</p>
-</section><section id="the-having-keyword"><h2 class="section-heading">The <code>HAVING</code> keyword<a class="anchor" aria-label="anchor" href="#the-having-keyword"></a>
-</h2>
+</section><section><h2 class="section-heading" id="the-having-keyword">The <code>HAVING</code> keyword<a class="anchor" aria-label="anchor" href="#the-having-keyword"></a>
+<a class="anchor" aria-label="anchor" href="#the-having-keyword"></a></h2>
 <hr class="half-width"><p>In the previous episode, we have seen the keyword <code>WHERE</code>,
 allowing to filter the results according to some criteria. SQL offers a
 mechanism to filter the results based on <strong>aggregate
@@ -602,8 +602,8 @@ <h3 class="code-label">SQL<i aria-hidden="true" data-feather="chevron-left"></i>
 </div>
 </div>
 </div>
-</section><section id="saving-queries-for-future-use"><h2 class="section-heading">Saving Queries for Future Use<a class="anchor" aria-label="anchor" href="#saving-queries-for-future-use"></a>
-</h2>
+</section><section><h2 class="section-heading" id="saving-queries-for-future-use">Saving Queries for Future Use<a class="anchor" aria-label="anchor" href="#saving-queries-for-future-use"></a>
+<a class="anchor" aria-label="anchor" href="#saving-queries-for-future-use"></a></h2>
 <hr class="half-width"><p>It is not uncommon to repeat the same operation more than once, for
 example for monitoring or reporting purposes. SQL comes with a very
 powerful mechanism to do this by creating views. Views are a form of
@@ -642,8 +642,8 @@ <h3 class="code-label">SQL<i aria-hidden="true" data-feather="chevron-left"></i>
 <span id="cb18-2"><a href="#cb18-2" tabindex="-1"></a><span class="kw">FROM</span> summer_2000</span>
 <span id="cb18-3"><a href="#cb18-3" tabindex="-1"></a><span class="kw">WHERE</span> species_id <span class="op">=</span> <span class="st">'PE'</span>;</span></code></pre>
 </div>
-</section><section id="what-about-null"><h2 class="section-heading">What About NULL?<a class="anchor" aria-label="anchor" href="#what-about-null"></a>
-</h2>
+</section><section><h2 class="section-heading" id="what-about-null">What About NULL?<a class="anchor" aria-label="anchor" href="#what-about-null"></a>
+<a class="anchor" aria-label="anchor" href="#what-about-null"></a></h2>
 <hr class="half-width"><p>From the last example, there should only be five records. If you look
 at the <code>weight</code> column, it’s easy to see what the average
 weight would be. If we use SQL to find the average weight, SQL behaves
@@ -751,7 +751,7 @@ <h3 class="callout-title">Key Points<a class="anchor" aria-label="anchor" href="
           Previous: Accessing Data With
         </a>
         <a class="chapter-link float-end" href="../instructor/03-sql-joins.html" rel="next">
-          Next: Combining Data With... 
+          Next: Combining Data With...
           <i aria-hidden="true" class="small-arrow" data-feather="arrow-right"></i>
         </a>
       </div>
@@ -762,18 +762,18 @@ <h3 class="callout-title">Key Points<a class="anchor" aria-label="anchor" href="
       		<footer class="row footer mx-md-3"><hr><div class="col-md-6">
         <p>This lesson is subject to the <a href="CODE_OF_CONDUCT.html">Code of Conduct</a></p>
         <p>
-        
+
         <a href="https://github.com/datacarpentry/sql-ecology-lesson/edit/main/episodes/02-sql-aggregation.md" class="external-link">Edit on GitHub</a>
-        
+
 	
         | <a href="https://github.com/datacarpentry/sql-ecology-lesson/blob/main/CONTRIBUTING.md" class="external-link">Contributing</a>
         | <a href="https://github.com/datacarpentry/sql-ecology-lesson/" class="external-link">Source</a></p>
 				<p><a href="https://github.com/datacarpentry/sql-ecology-lesson/blob/main/CITATION" class="external-link">Cite</a> | <a href="mailto:team@carpentries.org">Contact</a> | <a href="https://carpentries.org/about/" class="external-link">About</a></p>
 			</div>
 			<div class="col-md-6">
-        
+
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
-        
+
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
         <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.5" class="external-link">sandpaper (0.16.5)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.3" class="external-link">varnish (1.0.3)</a></p>
 			</div>
@@ -798,7 +798,7 @@ <h3 class="callout-title">Key Points<a class="anchor" aria-label="anchor" href="
   "identifier": "https://datacarpentry.github.io/sql-ecology-lesson/instructor/02-sql-aggregation.html",
   "dateCreated": "2015-02-10",
   "dateModified": "2023-04-21",
-  "datePublished": "2024-07-02"
+  "datePublished": "2024-07-09"
 }
 
   </script><script>
diff --git a/instructor/03-sql-joins.html b/instructor/03-sql-joins.html
index a9b9468e..5cca53a1 100644
--- a/instructor/03-sql-joins.html
+++ b/instructor/03-sql-joins.html
@@ -46,7 +46,7 @@
             </li>
           </ul></li>
       </div>
-      
+
       <div class="dropdown" id="instructor-dropdown">
         <button class="btn btn-secondary dropdown-toggle bordered-button" type="button" id="dropdownMenu1" data-bs-toggle="dropdown" aria-expanded="false">
           <i aria-hidden="true" class="icon" data-feather="eye"></i> Instructor View <i data-feather="chevron-down"></i>
@@ -170,7 +170,7 @@ <h2 class="accordion-header" id="flush-headingNine">
                 </div><!--/div.accordion-flush-->
               </div><!--div.sidenav-view-selector -->
             </div><!--/div.col -->
-      
+
             <hr></div><!--/div.mobile-row -->
 
           <div class="accordion accordion-flush" id="accordionFlush11">
@@ -189,7 +189,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
     <div class="accordion-header" id="flush-heading1">
         <a href="index.html">Summary and Schedule</a>
     </div><!--/div.accordion-header-->
-        
+
   </div><!--/div.accordion-item-->
 </div><!--/div.accordion-flush-->
 
@@ -198,7 +198,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
     <div class="accordion-header" id="flush-heading2">
         <a href="00-sql-introduction.html">1. Introducing Databases and SQL</a>
     </div><!--/div.accordion-header-->
-        
+
   </div><!--/div.accordion-item-->
 </div><!--/div.accordion-flush-->
 
@@ -207,7 +207,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
     <div class="accordion-header" id="flush-heading3">
         <a href="01-sql-basic-queries.html">2. Accessing Data With Queries</a>
     </div><!--/div.accordion-header-->
-        
+
   </div><!--/div.accordion-item-->
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@@ -216,7 +216,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
     <div class="accordion-header" id="flush-heading4">
         <a href="02-sql-aggregation.html">3. Aggregating and Grouping Data</a>
     </div><!--/div.accordion-header-->
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+
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 </div><!--/div.accordion-flush-->
 
@@ -230,7 +230,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
         </span>
       </button>
     </div><!--/div.accordion-header-->
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+
     <div id="flush-collapsecurrent" class="accordion-collapse collapse show" aria-labelledby="flush-headingcurrent" data-bs-parent="#accordionFlushcurrent">
       <div class="accordion-body">
         <ul><li><a href="#joins">Joins</a></li>
@@ -238,7 +238,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
 more</a></li>
         </ul></div><!--/div.accordion-body-->
     </div><!--/div.accordion-collapse-->
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+
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 </div><!--/div.accordion-flush-->
 
@@ -270,10 +270,10 @@ <h2 class="accordion-header" id="flush-headingTwelve">
               </div>
             </div>
             <hr class="half-width resources"><a href="../instructor/aio.html">See all in one page</a>
-            
+
 
             <hr class="d-none d-sm-block d-md-none"><div class="d-grid gap-1">
-            
+
             </div>
           </div><!-- /div.accordion -->
         </div><!-- /div.sidebar-inner -->
@@ -301,13 +301,13 @@ <h2 class="accordion-header" id="flush-headingTwelve">
       <hr></nav><main id="main-content" class="main-content"><div class="container lesson-content">
         <h1>Combining Data With Joins</h1>
         <p>Last updated on 2024-06-03 |
-        
+
         <a href="https://github.com/datacarpentry/sql-ecology-lesson/edit/main/episodes/03-sql-joins.md" class="external-link">Edit this page <i aria-hidden="true" data-feather="edit"></i></a></p>
-        
-        
-        
+
+
+
         <p>Estimated time: <i aria-hidden="true" data-feather="clock"></i> 25 minutes</p>
-        
+
         <div class="text-end">
           <button role="button" aria-pressed="false" tabindex="0" id="expand-code" class="pull-right" data-expand="Expand All Solutions " data-collapse="Collapse All Solutions "> Expand All Solutions <i aria-hidden="true" data-feather="plus"></i></button>
         </div>
@@ -338,8 +338,8 @@ <h3 class="card-title">Objectives</h3>
 </div>
 </div>
 </div>
-<section id="joins"><h2 class="section-heading">Joins<a class="anchor" aria-label="anchor" href="#joins"></a>
-</h2>
+<section><h2 class="section-heading" id="joins">Joins<a class="anchor" aria-label="anchor" href="#joins"></a>
+<a class="anchor" aria-label="anchor" href="#joins"></a></h2>
 <hr class="half-width"><p>To combine data from two tables we use an SQL <code>JOIN</code>
 clause, which comes after the <code>FROM</code> clause.</p>
 <p>Database tables are used to organize and group data by common
@@ -755,9 +755,9 @@ <h3 class="code-label">SQL<i aria-hidden="true" data-feather="chevron-left"></i>
 </div>
 </div>
 </div>
-</section><section id="functions-coalesce-and-nullif-and-more"><h2 class="section-heading">Functions <code>COALESCE</code> and <code>NULLIF</code> and
+</section><section><h2 class="section-heading" id="functions-coalesce-and-nullif-and-more">Functions <code>COALESCE</code> and <code>NULLIF</code> and
 more<a class="anchor" aria-label="anchor" href="#functions-coalesce-and-nullif-and-more"></a>
-</h2>
+<a class="anchor" aria-label="anchor" href="#functions-coalesce-and-nullif-and-more"></a></h2>
 <hr class="half-width"><p>SQL includes numerous functions for manipulating data. You’ve already
 seen some of these being used for aggregation (<code>SUM</code> and
 <code>COUNT</code>) but there are functions that operate on individual
@@ -1136,18 +1136,18 @@ <h3 class="callout-title">Key Points<a class="anchor" aria-label="anchor" href="
       		<footer class="row footer mx-md-3"><hr><div class="col-md-6">
         <p>This lesson is subject to the <a href="CODE_OF_CONDUCT.html">Code of Conduct</a></p>
         <p>
-        
+
         <a href="https://github.com/datacarpentry/sql-ecology-lesson/edit/main/episodes/03-sql-joins.md" class="external-link">Edit on GitHub</a>
-        
+
 	
         | <a href="https://github.com/datacarpentry/sql-ecology-lesson/blob/main/CONTRIBUTING.md" class="external-link">Contributing</a>
         | <a href="https://github.com/datacarpentry/sql-ecology-lesson/" class="external-link">Source</a></p>
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 			</div>
 			<div class="col-md-6">
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 			</div>
 			<div class="col-md-6">
-        
+
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-        
-        
-        
-        
-        
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+
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@@ -308,8 +308,8 @@ <h1></h1>
 with the development and instruction of lessons by Karen Cranston,
 Hilmar Lapp, Tracy Teal and Ethan White and contributions from Deb Paul
 and Mike Smorul.</p>
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 <hr class="half-width"><p>Data is from the Portal Project Teaching Database by S. K. Morgan
 Ernest, Thomas J. Valone, James H. Brown, and Ethan P. White.</p>
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 manipulation of a Chihuahuan Desert ecosystem near Portal, Arizona, USA.
 Ecology 90:1708.</p>
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             <hr class="half-width resources"><a href="../instructor/aio.html">See all in one page</a>
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       <hr></nav><main id="main-content" class="main-content"><div class="container lesson-content">
         <h1>Licenses</h1>
         <p>Last updated on 2023-04-21 |
-        
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         <a href="https://github.com/datacarpentry/sql-ecology-lesson/edit/main/LICENSE.md" class="external-link">Edit this page <i aria-hidden="true" data-feather="edit"></i></a></p>
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         </div>
 
         
 
-<section id="instructional-material"><h2 class="section-heading">Instructional Material<a class="anchor" aria-label="anchor" href="#instructional-material"></a>
-</h2>
+<section><h2 class="section-heading" id="instructional-material">Instructional Material<a class="anchor" aria-label="anchor" href="#instructional-material"></a>
+<a class="anchor" aria-label="anchor" href="#instructional-material"></a></h2>
 <hr class="half-width"><p>All Carpentries (Software Carpentry, Data Carpentry, and Library
 Carpentry) instructional material is made available under the <a href="https://creativecommons.org/licenses/by/4.0/" class="external-link">Creative Commons
 Attribution license</a>. The following is a human-readable summary of
@@ -335,8 +335,8 @@ <h1>Licenses</h1>
 permissions necessary for your intended use. For example, other rights
 such as publicity, privacy, or moral rights may limit how you use the
 material.</li>
-</ul></section><section id="software"><h2 class="section-heading">Software<a class="anchor" aria-label="anchor" href="#software"></a>
-</h2>
+</ul></section><section><h2 class="section-heading" id="software">Software<a class="anchor" aria-label="anchor" href="#software"></a>
+<a class="anchor" aria-label="anchor" href="#software"></a></h2>
 <hr class="half-width"><p>Except where otherwise noted, the example programs and other software
 provided by The Carpentries are made available under the <a href="https://opensource.org" class="external-link">OSI</a>-approved <a href="https://opensource.org/licenses/mit-license.html" class="external-link">MIT
 license</a>.</p>
@@ -356,8 +356,8 @@ <h1>Licenses</h1>
 CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.</p>
-</section><section id="trademark"><h2 class="section-heading">Trademark<a class="anchor" aria-label="anchor" href="#trademark"></a>
-</h2>
+</section><section><h2 class="section-heading" id="trademark">Trademark<a class="anchor" aria-label="anchor" href="#trademark"></a>
+<a class="anchor" aria-label="anchor" href="#trademark"></a></h2>
 <hr class="half-width"><p>“The Carpentries”, “Software Carpentry”, “Data Carpentry”, and
 “Library Carpentry” and their respective logos are registered trademarks
 of <a href="https://communityin.org/" class="external-link">Community Initiatives</a>.</p>
@@ -384,18 +384,18 @@ <h1>Licenses</h1>
       		<footer class="row footer mx-md-3"><hr><div class="col-md-6">
         <p>This lesson is subject to the <a href="CODE_OF_CONDUCT.html">Code of Conduct</a></p>
         <p>
-        
+
         <a href="https://github.com/datacarpentry/sql-ecology-lesson/edit/main/LICENSE.md" class="external-link">Edit on GitHub</a>
-        
+
 	
         | <a href="https://github.com/datacarpentry/sql-ecology-lesson/blob/main/CONTRIBUTING.md" class="external-link">Contributing</a>
         | <a href="https://github.com/datacarpentry/sql-ecology-lesson/" class="external-link">Source</a></p>
 				<p><a href="https://github.com/datacarpentry/sql-ecology-lesson/blob/main/CITATION" class="external-link">Cite</a> | <a href="mailto:team@carpentries.org">Contact</a> | <a href="https://carpentries.org/about/" class="external-link">About</a></p>
 			</div>
 			<div class="col-md-6">
-        
+
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
-        
+
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
         <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.5" class="external-link">sandpaper (0.16.5)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.3" class="external-link">varnish (1.0.3)</a></p>
 			</div>
@@ -420,7 +420,7 @@ <h1>Licenses</h1>
   "identifier": "https://datacarpentry.github.io/sql-ecology-lesson/instructor/LICENSE.html",
   "dateCreated": "2015-02-10",
   "dateModified": "2023-04-21",
-  "datePublished": "2024-07-02"
+  "datePublished": "2024-07-09"
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diff --git a/instructor/NEWS.html b/instructor/NEWS.html
index 5137231a..35eb8e53 100644
--- a/instructor/NEWS.html
+++ b/instructor/NEWS.html
@@ -46,7 +46,7 @@
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           </ul></li>
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-      
+
       <div class="dropdown" id="instructor-dropdown">
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           <i aria-hidden="true" class="icon" data-feather="eye"></i> Instructor View <i data-feather="chevron-down"></i>
@@ -170,7 +170,7 @@ <h2 class="accordion-header" id="flush-headingNine">
                 </div><!--/div.accordion-flush-->
               </div><!--div.sidenav-view-selector -->
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           <div class="accordion accordion-flush" id="accordionFlush11">
@@ -189,7 +189,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
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         <a href="index.html">Summary and Schedule</a>
     </div><!--/div.accordion-header-->
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 </div><!--/div.accordion-flush-->
 
@@ -198,7 +198,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
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         <a href="00-sql-introduction.html">1. Introducing Databases and SQL</a>
     </div><!--/div.accordion-header-->
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 </div><!--/div.accordion-flush-->
 
@@ -207,7 +207,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
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         <a href="01-sql-basic-queries.html">2. Accessing Data With Queries</a>
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@@ -216,7 +216,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
     <div class="accordion-header" id="flush-heading4">
         <a href="02-sql-aggregation.html">3. Aggregating and Grouping Data</a>
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@@ -225,7 +225,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
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         <a href="03-sql-joins.html">4. Combining Data With Joins</a>
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@@ -257,10 +257,10 @@ <h2 class="accordion-header" id="flush-headingTwelve">
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             </div>
             <hr class="half-width resources"><a href="../instructor/aio.html">See all in one page</a>
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             <hr class="d-none d-sm-block d-md-none"><div class="d-grid gap-1">
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@@ -288,20 +288,20 @@ <h2 class="accordion-header" id="flush-headingTwelve">
       <hr></nav><main id="main-content" class="main-content"><div class="container lesson-content">
         <h1></h1>
         <p>Last updated on 2023-04-21 |
-        
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         <a href="https://github.com/datacarpentry/sql-ecology-lesson/edit/main/NEWS.md" class="external-link">Edit this page <i aria-hidden="true" data-feather="edit"></i></a></p>
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         </div>
 
         
-<section id="data-carpentry-sql-ecology-lesson-2017.04.0"><h2 class="section-heading">Data Carpentry SQL Ecology lesson 2017.04.0<a class="anchor" aria-label="anchor" href="#data-carpentry-sql-ecology-lesson-2017.04.0"></a>
-</h2>
+<section><h2 class="section-heading" id="data-carpentry-sql-ecology-lesson-2017-04-0">Data Carpentry SQL Ecology lesson 2017.04.0<a class="anchor" aria-label="anchor" href="#data-carpentry-sql-ecology-lesson-2017.04.0"></a>
+<a class="anchor" aria-label="anchor" href="#data-carpentry-sql-ecology-lesson-2017-04-0"></a></h2>
 <hr class="half-width"><p>Initial release of the Data Carpentry SQL Ecology lesson</p>
 </section></div> <!-- / div.lesson-content -->
     </main><!-- / main#main-content.main-content --><nav class="bottom-pagination mx-md-4" aria-label="Previous and Next Chapter"><div class="d-block d-sm-block d-md-none">
@@ -326,18 +326,18 @@ <h1></h1>
       		<footer class="row footer mx-md-3"><hr><div class="col-md-6">
         <p>This lesson is subject to the <a href="CODE_OF_CONDUCT.html">Code of Conduct</a></p>
         <p>
-        
+
         <a href="https://github.com/datacarpentry/sql-ecology-lesson/edit/main/NEWS.md" class="external-link">Edit on GitHub</a>
-        
+
 	
         | <a href="https://github.com/datacarpentry/sql-ecology-lesson/blob/main/CONTRIBUTING.md" class="external-link">Contributing</a>
         | <a href="https://github.com/datacarpentry/sql-ecology-lesson/" class="external-link">Source</a></p>
 				<p><a href="https://github.com/datacarpentry/sql-ecology-lesson/blob/main/CITATION" class="external-link">Cite</a> | <a href="mailto:team@carpentries.org">Contact</a> | <a href="https://carpentries.org/about/" class="external-link">About</a></p>
 			</div>
 			<div class="col-md-6">
-        
+
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
-        
+
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
         <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.5" class="external-link">sandpaper (0.16.5)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.3" class="external-link">varnish (1.0.3)</a></p>
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diff --git a/instructor/aio.html b/instructor/aio.html
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--- a/instructor/aio.html
+++ b/instructor/aio.html
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@@ -206,7 +206,7 @@ <h2 class="accordion-header" id="flush-headingNine">
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         <a href="index.html">Summary and Schedule</a>
     </div>
 <!--/div.accordion-header-->
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 <!--/div.accordion-item-->
 </div>
@@ -240,7 +240,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
         <a href="00-sql-introduction.html">1. Introducing Databases and SQL</a>
     </div>
 <!--/div.accordion-header-->
-        
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 <!--/div.accordion-item-->
 </div>
@@ -252,7 +252,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
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     </div>
 <!--/div.accordion-header-->
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 <!--/div.accordion-item-->
 </div>
@@ -264,7 +264,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
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     </div>
 <!--/div.accordion-header-->
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 <!--/div.accordion-item-->
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@@ -276,7 +276,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
         <a href="03-sql-joins.html">4. Combining Data With Joins</a>
     </div>
 <!--/div.accordion-header-->
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 <!--/div.accordion-item-->
 </div>
@@ -317,11 +317,11 @@ <h2 class="accordion-header" id="flush-headingTwelve">
             </div>
             <hr class="half-width resources">
 <a href="../instructor/aio.html">See all in one page</a>
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             <hr class="d-none d-sm-block d-md-none">
 <div class="d-grid gap-1">
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@@ -342,7 +342,7 @@ <h2 class="accordion-header" id="flush-headingTwelve">
 <section id="aio-00-sql-introduction"><p>Content from <a href="00-sql-introduction.html">Introducing Databases and SQL</a></p>
 <hr>
 <p>Last updated on 2024-06-03 |
-        
+
         <a href="https://github.com/datacarpentry/sql-ecology-lesson/edit/main/episodes/00-sql-introduction.md" class="external-link">Edit this page <i aria-hidden="true" data-feather="edit"></i></a></p>
 <p>Estimated time: <i aria-hidden="true" data-feather="clock"></i> 65 minutes</p>
 <div class="text-end">
@@ -386,7 +386,8 @@ <h3 id="setup">Setup<a class="anchor" aria-label="anchor" href="#setup"></a>
 Project dataset</a> throughout this lesson. See <a href="index.html#setup">Setup</a> for instructions on how to download the
 data, and also how to install DB Browser for SQLite.</p>
 </div>
-<section id="motivation"><h2 class="section-heading">Motivation<a class="anchor" aria-label="anchor" href="#motivation"></a>
+<section><h2 class="section-heading" id="motivation">Motivation<a class="anchor" aria-label="anchor" href="#motivation"></a>
+<a class="anchor" aria-label="anchor" href="#motivation"></a>
 </h2>
 <hr class="half-width">
 <p>To start, let’s orient ourselves in our project workflow. Previously,
@@ -490,7 +491,8 @@ <h3 class="callout-title">Definition: <em>Relational Database</em><a class="anch
 </div>
 </div>
 </div>
-</section><section id="databases"><h2 class="section-heading">Databases<a class="anchor" aria-label="anchor" href="#databases"></a>
+</section><section><h2 class="section-heading" id="databases">Databases<a class="anchor" aria-label="anchor" href="#databases"></a>
+<a class="anchor" aria-label="anchor" href="#databases"></a>
 </h2>
 <hr class="half-width">
 <div class="section level3">
@@ -971,7 +973,7 @@ <h3 class="callout-title">Key Points<a class="anchor" aria-label="anchor" href="
 </section></section><section id="aio-01-sql-basic-queries"><p>Content from <a href="01-sql-basic-queries.html">Accessing Data With Queries</a></p>
 <hr>
 <p>Last updated on 2023-04-21 |
-        
+
         <a href="https://github.com/datacarpentry/sql-ecology-lesson/edit/main/episodes/01-sql-basic-queries.md" class="external-link">Edit this page <i aria-hidden="true" data-feather="edit"></i></a></p>
 <p>Estimated time: <i aria-hidden="true" data-feather="clock"></i> 35 minutes</p>
 <div class="text-end">
@@ -1004,7 +1006,8 @@ <h3 class="card-title">Objectives</h3>
 </div>
 </div>
 </div>
-<section id="writing-my-first-query"><h2 class="section-heading">Writing my first query<a class="anchor" aria-label="anchor" href="#writing-my-first-query"></a>
+<section><h2 class="section-heading" id="writing-my-first-query">Writing my first query<a class="anchor" aria-label="anchor" href="#writing-my-first-query"></a>
+<a class="anchor" aria-label="anchor" href="#writing-my-first-query"></a>
 </h2>
 <hr class="half-width">
 <p>Let’s start by using the <strong>surveys</strong> table. Here we have
@@ -1137,7 +1140,8 @@ <h3 class="code-label">SQL<i aria-hidden="true" data-feather="chevron-left"></i>
 </div>
 </div>
 </div>
-</section><section id="filtering"><h2 class="section-heading">Filtering<a class="anchor" aria-label="anchor" href="#filtering"></a>
+</section><section><h2 class="section-heading" id="filtering">Filtering<a class="anchor" aria-label="anchor" href="#filtering"></a>
+<a class="anchor" aria-label="anchor" href="#filtering"></a>
 </h2>
 <hr class="half-width">
 <p>Databases can also filter data – selecting only the data meeting
@@ -1218,7 +1222,8 @@ <h3 class="code-label">SQL<i aria-hidden="true" data-feather="chevron-left"></i>
 </div>
 </div>
 </div>
-</section><section id="building-more-complex-queries"><h2 class="section-heading">Building more complex queries<a class="anchor" aria-label="anchor" href="#building-more-complex-queries"></a>
+</section><section><h2 class="section-heading" id="building-more-complex-queries">Building more complex queries<a class="anchor" aria-label="anchor" href="#building-more-complex-queries"></a>
+<a class="anchor" aria-label="anchor" href="#building-more-complex-queries"></a>
 </h2>
 <hr class="half-width">
 <p>Now, let’s combine the above queries to get data for the 3
@@ -1258,7 +1263,8 @@ <h3 class="code-label">SQL<i aria-hidden="true" data-feather="chevron-left"></i>
 <p>Although SQL queries often read like plain English, it is
 <em>always</em> useful to add comments; this is especially true of more
 complex queries.</p>
-</section><section id="sorting"><h2 class="section-heading">Sorting<a class="anchor" aria-label="anchor" href="#sorting"></a>
+</section><section><h2 class="section-heading" id="sorting">Sorting<a class="anchor" aria-label="anchor" href="#sorting"></a>
+<a class="anchor" aria-label="anchor" href="#sorting"></a>
 </h2>
 <hr class="half-width">
 <p>We can also sort the results of our queries by using
@@ -1335,7 +1341,8 @@ <h3 class="code-label">SQL<i aria-hidden="true" data-feather="chevron-left"></i>
 </div>
 </div>
 </div>
-</section><section id="order-of-execution"><h2 class="section-heading">Order of execution<a class="anchor" aria-label="anchor" href="#order-of-execution"></a>
+</section><section><h2 class="section-heading" id="order-of-execution">Order of execution<a class="anchor" aria-label="anchor" href="#order-of-execution"></a>
+<a class="anchor" aria-label="anchor" href="#order-of-execution"></a>
 </h2>
 <hr class="half-width">
 <p>Another note for ordering. We don’t actually have to display a column
@@ -1437,7 +1444,7 @@ <h3 class="callout-title">Key Points<a class="anchor" aria-label="anchor" href="
 </section></section><section id="aio-02-sql-aggregation"><p>Content from <a href="02-sql-aggregation.html">Aggregating and Grouping Data</a></p>
 <hr>
 <p>Last updated on 2023-04-21 |
-        
+
         <a href="https://github.com/datacarpentry/sql-ecology-lesson/edit/main/episodes/02-sql-aggregation.md" class="external-link">Edit this page <i aria-hidden="true" data-feather="edit"></i></a></p>
 <p>Estimated time: <i aria-hidden="true" data-feather="clock"></i> 60 minutes</p>
 <div class="text-end">
@@ -1476,7 +1483,8 @@ <h3 class="card-title">Objectives</h3>
 </div>
 </div>
 </div>
-<section id="count-and-group-by"><h2 class="section-heading">COUNT and GROUP BY<a class="anchor" aria-label="anchor" href="#count-and-group-by"></a>
+<section><h2 class="section-heading" id="count-and-group-by">COUNT and GROUP BY<a class="anchor" aria-label="anchor" href="#count-and-group-by"></a>
+<a class="anchor" aria-label="anchor" href="#count-and-group-by"></a>
 </h2>
 <hr class="half-width">
 <p>Aggregation allows us to combine results by grouping records based on
@@ -1612,7 +1620,8 @@ <h3 class="code-label">SQL<i aria-hidden="true" data-feather="chevron-left"></i>
 </div>
 </div>
 </div>
-</section><section id="ordering-aggregated-results"><h2 class="section-heading">Ordering Aggregated Results<a class="anchor" aria-label="anchor" href="#ordering-aggregated-results"></a>
+</section><section><h2 class="section-heading" id="ordering-aggregated-results">Ordering Aggregated Results<a class="anchor" aria-label="anchor" href="#ordering-aggregated-results"></a>
+<a class="anchor" aria-label="anchor" href="#ordering-aggregated-results"></a>
 </h2>
 <hr class="half-width">
 <p>We can order the results of our aggregation by a specific column,
@@ -1626,7 +1635,8 @@ <h3 class="code-label">SQL<i aria-hidden="true" data-feather="chevron-left"></i>
 <span id="cb8-3"><a href="#cb8-3" tabindex="-1"></a><span class="kw">GROUP</span> <span class="kw">BY</span> species_id</span>
 <span id="cb8-4"><a href="#cb8-4" tabindex="-1"></a><span class="kw">ORDER</span> <span class="kw">BY</span> <span class="fu">COUNT</span>(species_id);</span></code></pre>
 </div>
-</section><section id="aliases"><h2 class="section-heading">Aliases<a class="anchor" aria-label="anchor" href="#aliases"></a>
+</section><section><h2 class="section-heading" id="aliases">Aliases<a class="anchor" aria-label="anchor" href="#aliases"></a>
+<a class="anchor" aria-label="anchor" href="#aliases"></a>
 </h2>
 <hr class="half-width">
 <p>As queries get more complex, the expressions we use can get long and
@@ -1666,7 +1676,8 @@ <h3 class="code-label">SQL<i aria-hidden="true" data-feather="chevron-left"></i>
 </div>
 <p>Aliasing table names can be helpful when working with queries that
 involve multiple tables; you will learn more about this later.</p>
-</section><section id="the-having-keyword"><h2 class="section-heading">The <code>HAVING</code> keyword<a class="anchor" aria-label="anchor" href="#the-having-keyword"></a>
+</section><section><h2 class="section-heading" id="the-having-keyword">The <code>HAVING</code> keyword<a class="anchor" aria-label="anchor" href="#the-having-keyword"></a>
+<a class="anchor" aria-label="anchor" href="#the-having-keyword"></a>
 </h2>
 <hr class="half-width">
 <p>In the previous episode, we have seen the keyword <code>WHERE</code>,
@@ -1738,7 +1749,8 @@ <h3 class="code-label">SQL<i aria-hidden="true" data-feather="chevron-left"></i>
 </div>
 </div>
 </div>
-</section><section id="saving-queries-for-future-use"><h2 class="section-heading">Saving Queries for Future Use<a class="anchor" aria-label="anchor" href="#saving-queries-for-future-use"></a>
+</section><section><h2 class="section-heading" id="saving-queries-for-future-use">Saving Queries for Future Use<a class="anchor" aria-label="anchor" href="#saving-queries-for-future-use"></a>
+<a class="anchor" aria-label="anchor" href="#saving-queries-for-future-use"></a>
 </h2>
 <hr class="half-width">
 <p>It is not uncommon to repeat the same operation more than once, for
@@ -1779,7 +1791,8 @@ <h3 class="code-label">SQL<i aria-hidden="true" data-feather="chevron-left"></i>
 <span id="cb18-2"><a href="#cb18-2" tabindex="-1"></a><span class="kw">FROM</span> summer_2000</span>
 <span id="cb18-3"><a href="#cb18-3" tabindex="-1"></a><span class="kw">WHERE</span> species_id <span class="op">=</span> <span class="st">'PE'</span>;</span></code></pre>
 </div>
-</section><section id="what-about-null"><h2 class="section-heading">What About NULL?<a class="anchor" aria-label="anchor" href="#what-about-null"></a>
+</section><section><h2 class="section-heading" id="what-about-null">What About NULL?<a class="anchor" aria-label="anchor" href="#what-about-null"></a>
+<a class="anchor" aria-label="anchor" href="#what-about-null"></a>
 </h2>
 <hr class="half-width">
 <p>From the last example, there should only be five records. If you look
@@ -1882,7 +1895,7 @@ <h3 class="callout-title">Key Points<a class="anchor" aria-label="anchor" href="
 </section></section><section id="aio-03-sql-joins"><p>Content from <a href="03-sql-joins.html">Combining Data With Joins</a></p>
 <hr>
 <p>Last updated on 2024-06-03 |
-        
+
         <a href="https://github.com/datacarpentry/sql-ecology-lesson/edit/main/episodes/03-sql-joins.md" class="external-link">Edit this page <i aria-hidden="true" data-feather="edit"></i></a></p>
 <p>Estimated time: <i aria-hidden="true" data-feather="clock"></i> 25 minutes</p>
 <div class="text-end">
@@ -1916,7 +1929,8 @@ <h3 class="card-title">Objectives</h3>
 </div>
 </div>
 </div>
-<section id="joins"><h2 class="section-heading">Joins<a class="anchor" aria-label="anchor" href="#joins"></a>
+<section><h2 class="section-heading" id="joins">Joins<a class="anchor" aria-label="anchor" href="#joins"></a>
+<a class="anchor" aria-label="anchor" href="#joins"></a>
 </h2>
 <hr class="half-width">
 <p>To combine data from two tables we use an SQL <code>JOIN</code>
@@ -2420,8 +2434,9 @@ <h3 class="code-label">SQL<i aria-hidden="true" data-feather="chevron-left"></i>
 </div>
 </div>
 </div>
-</section><section id="functions-coalesce-and-nullif-and-more"><h2 class="section-heading">Functions <code>COALESCE</code> and <code>NULLIF</code> and
+</section><section><h2 class="section-heading" id="functions-coalesce-and-nullif-and-more">Functions <code>COALESCE</code> and <code>NULLIF</code> and
 more<a class="anchor" aria-label="anchor" href="#functions-coalesce-and-nullif-and-more"></a>
+<a class="anchor" aria-label="anchor" href="#functions-coalesce-and-nullif-and-more"></a>
 </h2>
 <hr class="half-width">
 <p>SQL includes numerous functions for manipulating data. You’ve already
@@ -2857,18 +2872,18 @@ <h3 class="callout-title">Key Points<a class="anchor" aria-label="anchor" href="
 <div class="col-md-6">
         <p>This lesson is subject to the <a href="CODE_OF_CONDUCT.html">Code of Conduct</a></p>
         <p>
-        
+
         <a href="https://github.com/datacarpentry/sql-ecology-lesson/edit/main/README.md" class="external-link">Edit on GitHub</a>
-        
+
 	
         | <a href="https://github.com/datacarpentry/sql-ecology-lesson/blob/main/CONTRIBUTING.md" class="external-link">Contributing</a>
         | <a href="https://github.com/datacarpentry/sql-ecology-lesson/" class="external-link">Source</a></p>
 				<p><a href="https://github.com/datacarpentry/sql-ecology-lesson/blob/main/CITATION" class="external-link">Cite</a> | <a href="mailto:team@carpentries.org">Contact</a> | <a href="https://carpentries.org/about/" class="external-link">About</a></p>
 			</div>
 			<div class="col-md-6">
-        
+
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
-        
+
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
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diff --git a/instructor/discuss.html b/instructor/discuss.html
index 07ff5aaf..9dc19dbd 100644
--- a/instructor/discuss.html
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@@ -46,7 +46,7 @@
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+
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           <div class="accordion accordion-flush" id="accordionFlush11">
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         <a href="index.html">Summary and Schedule</a>
     </div><!--/div.accordion-header-->
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+
   </div><!--/div.accordion-item-->
 </div><!--/div.accordion-flush-->
 
@@ -198,7 +198,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
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         <a href="00-sql-introduction.html">1. Introducing Databases and SQL</a>
     </div><!--/div.accordion-header-->
-        
+
   </div><!--/div.accordion-item-->
 </div><!--/div.accordion-flush-->
 
@@ -207,7 +207,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
     <div class="accordion-header" id="flush-heading3">
         <a href="01-sql-basic-queries.html">2. Accessing Data With Queries</a>
     </div><!--/div.accordion-header-->
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   </div><!--/div.accordion-item-->
 </div><!--/div.accordion-flush-->
 
@@ -216,7 +216,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
     <div class="accordion-header" id="flush-heading4">
         <a href="02-sql-aggregation.html">3. Aggregating and Grouping Data</a>
     </div><!--/div.accordion-header-->
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 </div><!--/div.accordion-flush-->
 
@@ -225,7 +225,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
     <div class="accordion-header" id="flush-heading5">
         <a href="03-sql-joins.html">4. Combining Data With Joins</a>
     </div><!--/div.accordion-header-->
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 </div><!--/div.accordion-flush-->
 
@@ -257,10 +257,10 @@ <h2 class="accordion-header" id="flush-headingTwelve">
               </div>
             </div>
             <hr class="half-width resources"><a href="../instructor/aio.html">See all in one page</a>
-            
+
 
             <hr class="d-none d-sm-block d-md-none"><div class="d-grid gap-1">
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@@ -288,20 +288,20 @@ <h2 class="accordion-header" id="flush-headingTwelve">
       <hr></nav><main id="main-content" class="main-content"><div class="container lesson-content">
         <h1>Discussion</h1>
         <p>Last updated on 2023-04-21 |
-        
+
         <a href="https://github.com/datacarpentry/sql-ecology-lesson/edit/main/learners/discuss.md" class="external-link">Edit this page <i aria-hidden="true" data-feather="edit"></i></a></p>
-        
-        
-        
-        
-        
+
+
+
+
+
         <div class="text-end">
           <button role="button" aria-pressed="false" tabindex="0" id="expand-code" class="pull-right" data-expand="Expand All Solutions " data-collapse="Collapse All Solutions "> Expand All Solutions <i aria-hidden="true" data-feather="plus"></i></button>
         </div>
 
         
-<section id="proposed-episode-on-database-design"><h2 class="section-heading">Proposed Episode on Database Design<a class="anchor" aria-label="anchor" href="#proposed-episode-on-database-design"></a>
-</h2>
+<section><h2 class="section-heading" id="proposed-episode-on-database-design">Proposed Episode on Database Design<a class="anchor" aria-label="anchor" href="#proposed-episode-on-database-design"></a>
+<a class="anchor" aria-label="anchor" href="#proposed-episode-on-database-design"></a></h2>
 <hr class="half-width"><div class="section level3">
 <h3 id="q-a-on-database-design-review-if-time">Q &amp; A on Database Design (review if time)<a class="anchor" aria-label="anchor" href="#q-a-on-database-design-review-if-time"></a></h3>
 <ol style="list-style-type: decimal"><li>Order doesn’t matter</li>
@@ -380,18 +380,18 @@ <h3 id="other-database-management-systems">Other database management systems<a c
       		<footer class="row footer mx-md-3"><hr><div class="col-md-6">
         <p>This lesson is subject to the <a href="CODE_OF_CONDUCT.html">Code of Conduct</a></p>
         <p>
-        
+
         <a href="https://github.com/datacarpentry/sql-ecology-lesson/edit/main/learners/discuss.md" class="external-link">Edit on GitHub</a>
-        
+
 	
         | <a href="https://github.com/datacarpentry/sql-ecology-lesson/blob/main/CONTRIBUTING.md" class="external-link">Contributing</a>
         | <a href="https://github.com/datacarpentry/sql-ecology-lesson/" class="external-link">Source</a></p>
 				<p><a href="https://github.com/datacarpentry/sql-ecology-lesson/blob/main/CITATION" class="external-link">Cite</a> | <a href="mailto:team@carpentries.org">Contact</a> | <a href="https://carpentries.org/about/" class="external-link">About</a></p>
 			</div>
 			<div class="col-md-6">
-        
+
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
-        
+
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
         <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.5" class="external-link">sandpaper (0.16.5)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.3" class="external-link">varnish (1.0.3)</a></p>
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@@ -416,7 +416,7 @@ <h3 id="other-database-management-systems">Other database management systems<a c
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   "dateCreated": "2015-02-10",
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+  "datePublished": "2024-07-09"
 }
 
   </script><script>
diff --git a/instructor/images.html b/instructor/images.html
index 19682731..67f84c44 100644
--- a/instructor/images.html
+++ b/instructor/images.html
@@ -65,7 +65,7 @@
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 </li>
       </div>
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+
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@@ -206,7 +206,7 @@ <h2 class="accordion-header" id="flush-headingNine">
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             </div>
 <!--/div.col -->
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             <hr>
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         <a href="index.html">Summary and Schedule</a>
     </div>
 <!--/div.accordion-header-->
-        
+
   </div>
 <!--/div.accordion-item-->
 </div>
@@ -240,7 +240,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
         <a href="00-sql-introduction.html">1. Introducing Databases and SQL</a>
     </div>
 <!--/div.accordion-header-->
-        
+
   </div>
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@@ -252,7 +252,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
         <a href="01-sql-basic-queries.html">2. Accessing Data With Queries</a>
     </div>
 <!--/div.accordion-header-->
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+
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 <!--/div.accordion-item-->
 </div>
@@ -264,7 +264,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
         <a href="02-sql-aggregation.html">3. Aggregating and Grouping Data</a>
     </div>
 <!--/div.accordion-header-->
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 <!--/div.accordion-item-->
 </div>
@@ -276,7 +276,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
         <a href="03-sql-joins.html">4. Combining Data With Joins</a>
     </div>
 <!--/div.accordion-header-->
-        
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   </div>
 <!--/div.accordion-item-->
 </div>
@@ -317,11 +317,11 @@ <h2 class="accordion-header" id="flush-headingTwelve">
             </div>
             <hr class="half-width resources">
 <a href="../instructor/aio.html">See all in one page</a>
-            
+
 
             <hr class="d-none d-sm-block d-md-none">
 <div class="d-grid gap-1">
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             </div>
           </div>
 <!-- /div.accordion -->
@@ -360,18 +360,18 @@ <h3 id="03-sql-joins-figure-1">Figure 1</h3>
 <div class="col-md-6">
         <p>This lesson is subject to the <a href="CODE_OF_CONDUCT.html">Code of Conduct</a></p>
         <p>
-        
+
         <a href="https://github.com/datacarpentry/sql-ecology-lesson/edit/main/README.md" class="external-link">Edit on GitHub</a>
-        
+
 	
         | <a href="https://github.com/datacarpentry/sql-ecology-lesson/blob/main/CONTRIBUTING.md" class="external-link">Contributing</a>
         | <a href="https://github.com/datacarpentry/sql-ecology-lesson/" class="external-link">Source</a></p>
 				<p><a href="https://github.com/datacarpentry/sql-ecology-lesson/blob/main/CITATION" class="external-link">Cite</a> | <a href="mailto:team@carpentries.org">Contact</a> | <a href="https://carpentries.org/about/" class="external-link">About</a></p>
 			</div>
 			<div class="col-md-6">
-        
+
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
-        
+
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
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-  "dateModified": "2024-07-02",
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 }
 
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diff --git a/instructor/index.html b/instructor/index.html
index 5e3f9278..0fadee83 100644
--- a/instructor/index.html
+++ b/instructor/index.html
@@ -46,7 +46,7 @@
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+
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                 </div><!--/div.accordion-flush-->
               </div><!--div.sidenav-view-selector -->
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         </span>
       
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@@ -202,7 +202,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
     <div class="accordion-header" id="flush-heading2">
         <a href="00-sql-introduction.html">1. Introducing Databases and SQL</a>
     </div><!--/div.accordion-header-->
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@@ -211,7 +211,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
     <div class="accordion-header" id="flush-heading3">
         <a href="01-sql-basic-queries.html">2. Accessing Data With Queries</a>
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         <a href="02-sql-aggregation.html">3. Aggregating and Grouping Data</a>
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         <a href="03-sql-joins.html">4. Combining Data With Joins</a>
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             <hr class="half-width resources"><a href="../instructor/aio.html">See all in one page</a>
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-      </section><section id="setup"><section id="setup"><h2 class="section-heading">Setup<a class="anchor" aria-label="anchor" href="#setup"></a>
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+      </section><section id="setup"><section><h2 class="section-heading" id="setup">Setup<a class="anchor" aria-label="anchor" href="#setup"></a>
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         <p>This lesson is subject to the <a href="CODE_OF_CONDUCT.html">Code of Conduct</a></p>
         <p>
-        
+
         <a href="https://github.com/datacarpentry/sql-ecology-lesson/edit/main/index.md" class="external-link">Edit on GitHub</a>
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 			</div>
 			<div class="col-md-6">
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+
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diff --git a/instructor/instructor-notes.html b/instructor/instructor-notes.html
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@@ -65,7 +65,7 @@
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 directory.</p>
-</section><section id="motivation-and-framing"><h2 class="section-heading">Motivation and Framing<a class="anchor" aria-label="anchor" href="#motivation-and-framing"></a>
+</section><section><h2 class="section-heading" id="motivation-and-framing">Motivation and Framing<a class="anchor" aria-label="anchor" href="#motivation-and-framing"></a>
+<a class="anchor" aria-label="anchor" href="#motivation-and-framing"></a>
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 <hr class="half-width">
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 data -&gt; clean data -&gt; import and analyze -&gt; results -&gt;
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 between clean data and analysis.</p>
-</section><section id="common-difficult-concepts"><h2 class="section-heading">Common Difficult Concepts<a class="anchor" aria-label="anchor" href="#common-difficult-concepts"></a>
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+<a class="anchor" aria-label="anchor" href="#common-difficult-concepts"></a>
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 especially when they’re from a totally different domain</li>
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 your result and how do you know?)</li>
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-        
+
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+
 	
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 				<p><a href="https://github.com/datacarpentry/sql-ecology-lesson/blob/main/CITATION" class="external-link">Cite</a> | <a href="mailto:team@carpentries.org">Contact</a> | <a href="https://carpentries.org/about/" class="external-link">About</a></p>
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diff --git a/instructor/key-points.html b/instructor/key-points.html
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+
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 <div class="col-md-6">
         <p>This lesson is subject to the <a href="CODE_OF_CONDUCT.html">Code of Conduct</a></p>
         <p>
-        
+
         <a href="https://github.com/datacarpentry/sql-ecology-lesson/edit/main/README.md" class="external-link">Edit on GitHub</a>
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+
 	
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 			</div>
 			<div class="col-md-6">
-        
+
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-        
+
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         <p>
-        
+
         <a href="https://github.com/datacarpentry/sql-ecology-lesson/edit/main/README.md" class="external-link">Edit on GitHub</a>
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+
 	
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 			</div>
 			<div class="col-md-6">
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+
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+
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@@ -170,7 +170,7 @@ <h2 class="accordion-header" id="flush-headingNine">
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@@ -189,7 +189,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
     <div class="accordion-header" id="flush-heading1">
         <a href="index.html">Summary and Schedule</a>
     </div><!--/div.accordion-header-->
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@@ -198,7 +198,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
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         <a href="00-sql-introduction.html">1. Introducing Databases and SQL</a>
     </div><!--/div.accordion-header-->
-        
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 </div><!--/div.accordion-flush-->
 
@@ -207,7 +207,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
     <div class="accordion-header" id="flush-heading3">
         <a href="01-sql-basic-queries.html">2. Accessing Data With Queries</a>
     </div><!--/div.accordion-header-->
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 </div><!--/div.accordion-flush-->
 
@@ -216,7 +216,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
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         <a href="02-sql-aggregation.html">3. Aggregating and Grouping Data</a>
     </div><!--/div.accordion-header-->
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 </div><!--/div.accordion-flush-->
 
@@ -225,7 +225,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
     <div class="accordion-header" id="flush-heading5">
         <a href="03-sql-joins.html">4. Combining Data With Joins</a>
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               </div>
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             <hr class="half-width resources"><a href="../instructor/aio.html">See all in one page</a>
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             <hr class="d-none d-sm-block d-md-none"><div class="d-grid gap-1">
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@@ -288,21 +288,21 @@ <h2 class="accordion-header" id="flush-headingTwelve">
       <hr></nav><main id="main-content" class="main-content"><div class="container lesson-content">
         <h1>Reference</h1>
         <p>Last updated on 2023-10-19 |
-        
+
         <a href="https://github.com/datacarpentry/sql-ecology-lesson/edit/main/learners/reference.md" class="external-link">Edit this page <i aria-hidden="true" data-feather="edit"></i></a></p>
-        
-        
-        
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+
         <div class="text-end">
           <button role="button" aria-pressed="false" tabindex="0" id="expand-code" class="pull-right" data-expand="Expand All Solutions " data-collapse="Collapse All Solutions "> Expand All Solutions <i aria-hidden="true" data-feather="plus"></i></button>
         </div>
 
         
 
-<section id="glossary"><h2 class="section-heading">Glossary<a class="anchor" aria-label="anchor" href="#glossary"></a>
-</h2>
+<section><h2 class="section-heading" id="glossary">Glossary<a class="anchor" aria-label="anchor" href="#glossary"></a>
+<a class="anchor" aria-label="anchor" href="#glossary"></a></h2>
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 <dl><dt><a href="https://glosario.carpentries.org/en/#aggreation" class="external-link"><span id="aggreation"><strong>aggreation</strong></span></a></dt>
@@ -401,8 +401,8 @@ <h1>Reference</h1>
 represents one record or observation) and columns (each of which
 represents a <a href="#field">field</a> or variable.)
 </dd>
-</dl></section><section id="commands"><h2 class="section-heading">Commands<a class="anchor" aria-label="anchor" href="#commands"></a>
-</h2>
+</dl></section><section><h2 class="section-heading" id="commands">Commands<a class="anchor" aria-label="anchor" href="#commands"></a>
+<a class="anchor" aria-label="anchor" href="#commands"></a></h2>
 <hr class="half-width"><p>See <a href="sql-cheat-sheet.html">this cheat sheet</a> for an list
 of the commands covered in this lesson.</p>
 <div class="section level3">
@@ -568,18 +568,18 @@ <h3 id="keywords">Keywords<a class="anchor" aria-label="anchor" href="#keywords"
       		<footer class="row footer mx-md-3"><hr><div class="col-md-6">
         <p>This lesson is subject to the <a href="CODE_OF_CONDUCT.html">Code of Conduct</a></p>
         <p>
-        
+
         <a href="https://github.com/datacarpentry/sql-ecology-lesson/edit/main/learners/reference.md" class="external-link">Edit on GitHub</a>
-        
+
 	
         | <a href="https://github.com/datacarpentry/sql-ecology-lesson/blob/main/CONTRIBUTING.md" class="external-link">Contributing</a>
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 				<p><a href="https://github.com/datacarpentry/sql-ecology-lesson/blob/main/CITATION" class="external-link">Cite</a> | <a href="mailto:team@carpentries.org">Contact</a> | <a href="https://carpentries.org/about/" class="external-link">About</a></p>
 			</div>
 			<div class="col-md-6">
-        
+
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
-        
+
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
         <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.5" class="external-link">sandpaper (0.16.5)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.3" class="external-link">varnish (1.0.3)</a></p>
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@@ -604,7 +604,7 @@ <h3 id="keywords">Keywords<a class="anchor" aria-label="anchor" href="#keywords"
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   "dateCreated": "2015-02-10",
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+  "datePublished": "2024-07-09"
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diff --git a/instructor/sql-cheat-sheet.html b/instructor/sql-cheat-sheet.html
index 2f27fd9c..a7df1f0e 100644
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+++ b/instructor/sql-cheat-sheet.html
@@ -46,7 +46,7 @@
             </li>
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-      
+
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@@ -170,7 +170,7 @@ <h2 class="accordion-header" id="flush-headingNine">
                 </div><!--/div.accordion-flush-->
               </div><!--div.sidenav-view-selector -->
             </div><!--/div.col -->
-      
+
             <hr></div><!--/div.mobile-row -->
 
           <div class="accordion accordion-flush" id="accordionFlush11">
@@ -189,7 +189,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
     <div class="accordion-header" id="flush-heading1">
         <a href="index.html">Summary and Schedule</a>
     </div><!--/div.accordion-header-->
-        
+
   </div><!--/div.accordion-item-->
 </div><!--/div.accordion-flush-->
 
@@ -198,7 +198,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
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         <a href="00-sql-introduction.html">1. Introducing Databases and SQL</a>
     </div><!--/div.accordion-header-->
-        
+
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 </div><!--/div.accordion-flush-->
 
@@ -207,7 +207,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
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         <a href="01-sql-basic-queries.html">2. Accessing Data With Queries</a>
     </div><!--/div.accordion-header-->
-        
+
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 </div><!--/div.accordion-flush-->
 
@@ -216,7 +216,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
     <div class="accordion-header" id="flush-heading4">
         <a href="02-sql-aggregation.html">3. Aggregating and Grouping Data</a>
     </div><!--/div.accordion-header-->
-        
+
   </div><!--/div.accordion-item-->
 </div><!--/div.accordion-flush-->
 
@@ -225,7 +225,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
     <div class="accordion-header" id="flush-heading5">
         <a href="03-sql-joins.html">4. Combining Data With Joins</a>
     </div><!--/div.accordion-header-->
-        
+
   </div><!--/div.accordion-item-->
 </div><!--/div.accordion-flush-->
 
@@ -257,10 +257,10 @@ <h2 class="accordion-header" id="flush-headingTwelve">
               </div>
             </div>
             <hr class="half-width resources"><a href="../instructor/aio.html">See all in one page</a>
-            
+
 
             <hr class="d-none d-sm-block d-md-none"><div class="d-grid gap-1">
-            
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             </div>
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@@ -288,21 +288,21 @@ <h2 class="accordion-header" id="flush-headingTwelve">
       <hr></nav><main id="main-content" class="main-content"><div class="container lesson-content">
         <h1>SQL Cheat Sheet</h1>
         <p>Last updated on 2023-10-19 |
-        
+
         <a href="https://github.com/datacarpentry/sql-ecology-lesson/edit/main/learners/sql-cheat-sheet.md" class="external-link">Edit this page <i aria-hidden="true" data-feather="edit"></i></a></p>
-        
-        
-        
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-        
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+
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+
         <div class="text-end">
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         </div>
 
         
 
-<section id="basic-queries"><h2 class="section-heading">Basic Queries<a class="anchor" aria-label="anchor" href="#basic-queries"></a>
-</h2>
+<section><h2 class="section-heading" id="basic-queries">Basic Queries<a class="anchor" aria-label="anchor" href="#basic-queries"></a>
+<a class="anchor" aria-label="anchor" href="#basic-queries"></a></h2>
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 <div class="codewrapper sourceCode" id="cb1">
 <h3 class="code-label">SH<i aria-hidden="true" data-feather="chevron-left"></i><i aria-hidden="true" data-feather="chevron-right"></i>
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 </h3>
 <pre class="sourceCode sh" tabindex="0"><code class="sourceCode bash"><span id="cb4-1"><a href="#cb4-1" tabindex="-1"></a><span class="ex">SELECT</span> column_name_1, ROUND<span class="er">(</span><span class="ex">column_name_2</span> / 1000.0<span class="kw">)</span> <span class="ex">FROM</span> table_name<span class="kw">;</span></span></code></pre>
 </div>
-</section><section id="filtering"><h2 class="section-heading">Filtering<a class="anchor" aria-label="anchor" href="#filtering"></a>
-</h2>
+</section><section><h2 class="section-heading" id="filtering">Filtering<a class="anchor" aria-label="anchor" href="#filtering"></a>
+<a class="anchor" aria-label="anchor" href="#filtering"></a></h2>
 <hr class="half-width"><p>Select only the data meeting certain criteria:</p>
 <div class="codewrapper sourceCode" id="cb5">
 <h3 class="code-label">SH<i aria-hidden="true" data-feather="chevron-left"></i><i aria-hidden="true" data-feather="chevron-right"></i>
@@ -341,8 +341,8 @@ <h3 class="code-label">SH<i aria-hidden="true" data-feather="chevron-left"></i><
 </h3>
 <pre class="sourceCode sh" tabindex="0"><code class="sourceCode bash"><span id="cb6-1"><a href="#cb6-1" tabindex="-1"></a><span class="ex">SELECT</span> <span class="pp">*</span> FROM table_name WHERE <span class="er">(</span><span class="ex">column_name_1</span> <span class="op">&gt;</span>= 1000<span class="kw">)</span> <span class="ex">AND</span> <span class="er">(</span><span class="ex">column_name_2</span> = <span class="st">'A'</span> OR column_name_2 = <span class="st">'B'</span><span class="kw">);</span></span></code></pre>
 </div>
-</section><section id="sorting"><h2 class="section-heading">Sorting<a class="anchor" aria-label="anchor" href="#sorting"></a>
-</h2>
+</section><section><h2 class="section-heading" id="sorting">Sorting<a class="anchor" aria-label="anchor" href="#sorting"></a>
+<a class="anchor" aria-label="anchor" href="#sorting"></a></h2>
 <hr class="half-width"><p>Sort results using <code>ASC</code> for ascending order or
 <code>DESC</code> for descending order:</p>
 <div class="codewrapper sourceCode" id="cb7">
@@ -350,8 +350,8 @@ <h3 class="code-label">SH<i aria-hidden="true" data-feather="chevron-left"></i><
 </h3>
 <pre class="sourceCode sh" tabindex="0"><code class="sourceCode bash"><span id="cb7-1"><a href="#cb7-1" tabindex="-1"></a><span class="ex">SELECT</span> <span class="pp">*</span> FROM table_name ORDER BY column_name_1 ASC, column_name_2 DESC<span class="kw">;</span></span></code></pre>
 </div>
-</section><section id="missing-data"><h2 class="section-heading">Missing Data<a class="anchor" aria-label="anchor" href="#missing-data"></a>
-</h2>
+</section><section><h2 class="section-heading" id="missing-data">Missing Data<a class="anchor" aria-label="anchor" href="#missing-data"></a>
+<a class="anchor" aria-label="anchor" href="#missing-data"></a></h2>
 <hr class="half-width"><p>Use <code>NULL</code> to represent missing data.</p>
 <p><code>NULL</code> is neither true nor false. Operations involving
 <code>NULL</code> produce <code>NULL</code>, e.g., <code>1+NULL</code>,
@@ -369,30 +369,30 @@ <h3 class="code-label">SH<i aria-hidden="true" data-feather="chevron-left"></i><
 </h3>
 <pre class="sourceCode sh" tabindex="0"><code class="sourceCode bash"><span id="cb9-1"><a href="#cb9-1" tabindex="-1"></a><span class="ex">SELECT</span> <span class="pp">*</span> FROM table_name WHERE column_name IS NOT NULL<span class="kw">;</span></span></code></pre>
 </div>
-</section><section id="grouping-and-aggregation"><h2 class="section-heading">Grouping and Aggregation<a class="anchor" aria-label="anchor" href="#grouping-and-aggregation"></a>
-</h2>
+</section><section><h2 class="section-heading" id="grouping-and-aggregation">Grouping and Aggregation<a class="anchor" aria-label="anchor" href="#grouping-and-aggregation"></a>
+<a class="anchor" aria-label="anchor" href="#grouping-and-aggregation"></a></h2>
 <hr class="half-width"><p>Combine data into groups and calculate combined values in groups:</p>
 <div class="codewrapper sourceCode" id="cb10">
 <h3 class="code-label">SH<i aria-hidden="true" data-feather="chevron-left"></i><i aria-hidden="true" data-feather="chevron-right"></i>
 </h3>
 <pre class="sourceCode sh" tabindex="0"><code class="sourceCode bash"><span id="cb10-1"><a href="#cb10-1" tabindex="-1"></a><span class="ex">SELECT</span> column_name_1, SUM<span class="er">(</span><span class="ex">column_name_2</span><span class="kw">)</span><span class="ex">,</span> COUNT<span class="er">(</span><span class="ex">*</span><span class="kw">)</span> <span class="ex">FROM</span> table_name GROUP BY column_name_1<span class="kw">;</span></span></code></pre>
 </div>
-</section><section id="joins"><h2 class="section-heading">Joins<a class="anchor" aria-label="anchor" href="#joins"></a>
-</h2>
+</section><section><h2 class="section-heading" id="joins">Joins<a class="anchor" aria-label="anchor" href="#joins"></a>
+<a class="anchor" aria-label="anchor" href="#joins"></a></h2>
 <hr class="half-width"><p>Join data from two tables:</p>
 <div class="codewrapper sourceCode" id="cb11">
 <h3 class="code-label">SH<i aria-hidden="true" data-feather="chevron-left"></i><i aria-hidden="true" data-feather="chevron-right"></i>
 </h3>
 <pre class="sourceCode sh" tabindex="0"><code class="sourceCode bash"><span id="cb11-1"><a href="#cb11-1" tabindex="-1"></a><span class="ex">SELECT</span> <span class="pp">*</span> FROM table_name_1 JOIN table_name_2 ON table_name_1.column_name = table_name_2.column_name<span class="kw">;</span></span></code></pre>
 </div>
-</section><section id="combining-commands"><h2 class="section-heading">Combining Commands<a class="anchor" aria-label="anchor" href="#combining-commands"></a>
-</h2>
+</section><section><h2 class="section-heading" id="combining-commands">Combining Commands<a class="anchor" aria-label="anchor" href="#combining-commands"></a>
+<a class="anchor" aria-label="anchor" href="#combining-commands"></a></h2>
 <hr class="half-width"><p>SQL commands must be combined in the following order:
 <code>SELECT</code>, <code>FROM</code>, <code>JOIN</code>,
 <code>ON</code>, <code>WHERE</code>, <code>GROUP BY</code>,
 <code>ORDER BY</code>.</p>
-</section><section id="creating-tables"><h2 class="section-heading">Creating Tables<a class="anchor" aria-label="anchor" href="#creating-tables"></a>
-</h2>
+</section><section><h2 class="section-heading" id="creating-tables">Creating Tables<a class="anchor" aria-label="anchor" href="#creating-tables"></a>
+<a class="anchor" aria-label="anchor" href="#creating-tables"></a></h2>
 <hr class="half-width"><p>Create tables by specifying column names and types. Include primary
 and foreign key relationships and other constraints.</p>
 <div class="codewrapper sourceCode" id="cb12">
@@ -406,8 +406,8 @@ <h3 class="code-label">SH<i aria-hidden="true" data-feather="chevron-left"></i><
 <span id="cb12-6"><a href="#cb12-6" tabindex="-1"></a>        <span class="ex">FOREIGN</span> KEY<span class="er">(</span><span class="ex">person</span><span class="kw">)</span> <span class="ex">REFERENCES</span> person<span class="er">(</span><span class="ex">ident</span><span class="kw">)</span></span>
 <span id="cb12-7"><a href="#cb12-7" tabindex="-1"></a><span class="kw">);</span></span></code></pre>
 </div>
-</section><section id="transactions"><h2 class="section-heading">Transactions<a class="anchor" aria-label="anchor" href="#transactions"></a>
-</h2>
+</section><section><h2 class="section-heading" id="transactions">Transactions<a class="anchor" aria-label="anchor" href="#transactions"></a>
+<a class="anchor" aria-label="anchor" href="#transactions"></a></h2>
 <hr class="half-width"><p>Put multiple queries in a transaction to ensure they are ACID
 (atomic, consistent, isolated, and durable):</p>
 <div class="codewrapper sourceCode" id="cb13">
@@ -418,8 +418,8 @@ <h3 class="code-label">SH<i aria-hidden="true" data-feather="chevron-left"></i><
 <span id="cb13-3"><a href="#cb13-3" tabindex="-1"></a>  <span class="ex">INSERT</span> INTO table_name_2 values<span class="er">(</span><span class="ex">...</span><span class="kw">);</span></span>
 <span id="cb13-4"><a href="#cb13-4" tabindex="-1"></a><span class="ex">END</span> TRANSACTION<span class="kw">;</span></span></code></pre>
 </div>
-</section><section id="programming"><h2 class="section-heading">Programming<a class="anchor" aria-label="anchor" href="#programming"></a>
-</h2>
+</section><section><h2 class="section-heading" id="programming">Programming<a class="anchor" aria-label="anchor" href="#programming"></a>
+<a class="anchor" aria-label="anchor" href="#programming"></a></h2>
 <hr class="half-width"><p>Execute queries in a general-purpose programming language by:</p>
 <ul><li>loading the appropriate library</li>
 <li>creating a connection</li>
@@ -466,18 +466,18 @@ <h3 class="code-label">SH<i aria-hidden="true" data-feather="chevron-left"></i><
       		<footer class="row footer mx-md-3"><hr><div class="col-md-6">
         <p>This lesson is subject to the <a href="CODE_OF_CONDUCT.html">Code of Conduct</a></p>
         <p>
-        
+
         <a href="https://github.com/datacarpentry/sql-ecology-lesson/edit/main/learners/sql-cheat-sheet.md" class="external-link">Edit on GitHub</a>
-        
+
 	
         | <a href="https://github.com/datacarpentry/sql-ecology-lesson/blob/main/CONTRIBUTING.md" class="external-link">Contributing</a>
         | <a href="https://github.com/datacarpentry/sql-ecology-lesson/" class="external-link">Source</a></p>
 				<p><a href="https://github.com/datacarpentry/sql-ecology-lesson/blob/main/CITATION" class="external-link">Cite</a> | <a href="mailto:team@carpentries.org">Contact</a> | <a href="https://carpentries.org/about/" class="external-link">About</a></p>
 			</div>
 			<div class="col-md-6">
-        
+
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
-        
+
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
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@@ -502,7 +502,7 @@ <h3 class="code-label">SH<i aria-hidden="true" data-feather="chevron-left"></i><
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   "dateCreated": "2015-02-10",
   "dateModified": "2023-10-19",
-  "datePublished": "2024-07-02"
+  "datePublished": "2024-07-09"
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diff --git a/key-points.html b/key-points.html
index 96f08f61..3c8ac603 100644
--- a/key-points.html
+++ b/key-points.html
@@ -65,7 +65,7 @@
           </ul>
 </li>
       </div>
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+
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@@ -205,7 +205,7 @@ <h2 class="accordion-header" id="flush-headingNine">
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+
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 <!--/div.accordion-header-->
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@@ -251,7 +251,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
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+
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+
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+
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+
 
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@@ -399,18 +399,18 @@ <h2 class="accordion-header" id="flush-headingTwelve">
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         <p>This lesson is subject to the <a href="CODE_OF_CONDUCT.html">Code of Conduct</a></p>
         <p>
-        
+
         <a href="https://github.com/datacarpentry/sql-ecology-lesson/edit/main/README.md" class="external-link">Edit on GitHub</a>
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+
 	
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 				<p><a href="https://github.com/datacarpentry/sql-ecology-lesson/blob/main/CITATION" class="external-link">Cite</a> | <a href="mailto:team@carpentries.org">Contact</a> | <a href="https://carpentries.org/about/" class="external-link">About</a></p>
 			</div>
 			<div class="col-md-6">
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index d85ad837..8e13756a 100644
--- a/profiles.html
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@@ -46,7 +46,7 @@
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+
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@@ -170,7 +170,7 @@ <h2 class="accordion-header" id="flush-headingNine">
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+
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           <div class="accordion accordion-flush" id="accordionFlush11">
@@ -189,7 +189,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
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         <a href="00-sql-introduction.html">1. Introducing Databases and SQL</a>
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@@ -207,7 +207,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
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             <hr class="half-width resources"><a href="aio.html">See all in one page</a>
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+
 
             <hr class="d-none d-sm-block d-md-none"><div class="d-grid gap-1">
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@@ -283,18 +283,18 @@ <h1>Learner Profiles</h1>
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         <p>This lesson is subject to the <a href="CODE_OF_CONDUCT.html">Code of Conduct</a></p>
         <p>
-        
+
         <a href="https://github.com/datacarpentry/sql-ecology-lesson/edit/main/README.md" class="external-link">Edit on GitHub</a>
-        
+
 	
         | <a href="https://github.com/datacarpentry/sql-ecology-lesson/blob/main/CONTRIBUTING.md" class="external-link">Contributing</a>
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 				<p><a href="https://github.com/datacarpentry/sql-ecology-lesson/blob/main/CITATION" class="external-link">Cite</a> | <a href="mailto:team@carpentries.org">Contact</a> | <a href="https://carpentries.org/about/" class="external-link">About</a></p>
 			</div>
 			<div class="col-md-6">
-        
+
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
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+
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-  "dateModified": "2024-07-02",
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diff --git a/reference.html b/reference.html
index abf9a54d..da546148 100644
--- a/reference.html
+++ b/reference.html
@@ -46,7 +46,7 @@
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+
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@@ -170,7 +170,7 @@ <h2 class="accordion-header" id="flush-headingNine">
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               </div><!--div.sidenav-view-selector -->
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+
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           <div class="accordion accordion-flush" id="accordionFlush11">
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@@ -207,7 +207,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
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@@ -216,7 +216,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
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         <a href="02-sql-aggregation.html">3. Aggregating and Grouping Data</a>
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-        
+
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@@ -225,7 +225,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
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         <a href="03-sql-joins.html">4. Combining Data With Joins</a>
     </div><!--/div.accordion-header-->
-        
+
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 </div><!--/div.accordion-flush-->
 
@@ -257,10 +257,10 @@ <h2 class="accordion-header" id="flush-headingTwelve">
               </div>
             </div>
             <hr class="half-width resources"><a href="aio.html">See all in one page</a>
-            
+
 
             <hr class="d-none d-sm-block d-md-none"><div class="d-grid gap-1">
-            
+
             </div>
           </div><!-- /div.accordion -->
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@@ -288,19 +288,19 @@ <h2 class="accordion-header" id="flush-headingTwelve">
       <hr></nav><main id="main-content" class="main-content"><div class="container lesson-content">
         <h1>Reference</h1>
         <p>Last updated on 2023-10-19 |
-        
+
         <a href="https://github.com/datacarpentry/sql-ecology-lesson/edit/main/learners/reference.md" class="external-link">Edit this page <i aria-hidden="true" data-feather="edit"></i></a></p>
-        
-        
-        
+
+
+
         <div class="text-end">
           <button role="button" aria-pressed="false" tabindex="0" id="expand-code" class="pull-right" data-expand="Expand All Solutions " data-collapse="Collapse All Solutions "> Expand All Solutions <i aria-hidden="true" data-feather="plus"></i></button>
         </div>
 
         
 
-<section id="glossary"><h2 class="section-heading">Glossary<a class="anchor" aria-label="anchor" href="#glossary"></a>
-</h2>
+<section><h2 class="section-heading" id="glossary">Glossary<a class="anchor" aria-label="anchor" href="#glossary"></a>
+<a class="anchor" aria-label="anchor" href="#glossary"></a></h2>
 <hr class="half-width"><p><em>The definitions below are modified from the <a href="https://glosario.carpentries.org/" class="external-link">Carpentries Glosario</a>
 (CC-BY-4.0)</em></p>
 <dl><dt><a href="https://glosario.carpentries.org/en/#aggreation" class="external-link"><span id="aggreation"><strong>aggreation</strong></span></a></dt>
@@ -399,8 +399,8 @@ <h1>Reference</h1>
 represents one record or observation) and columns (each of which
 represents a <a href="#field">field</a> or variable.)
 </dd>
-</dl></section><section id="commands"><h2 class="section-heading">Commands<a class="anchor" aria-label="anchor" href="#commands"></a>
-</h2>
+</dl></section><section><h2 class="section-heading" id="commands">Commands<a class="anchor" aria-label="anchor" href="#commands"></a>
+<a class="anchor" aria-label="anchor" href="#commands"></a></h2>
 <hr class="half-width"><p>See <a href="sql-cheat-sheet.html">this cheat sheet</a> for an list
 of the commands covered in this lesson.</p>
 <div class="section level3">
@@ -566,18 +566,18 @@ <h3 id="keywords">Keywords<a class="anchor" aria-label="anchor" href="#keywords"
       		<footer class="row footer mx-md-3"><hr><div class="col-md-6">
         <p>This lesson is subject to the <a href="CODE_OF_CONDUCT.html">Code of Conduct</a></p>
         <p>
-        
+
         <a href="https://github.com/datacarpentry/sql-ecology-lesson/edit/main/learners/reference.md" class="external-link">Edit on GitHub</a>
-        
+
 	
         | <a href="https://github.com/datacarpentry/sql-ecology-lesson/blob/main/CONTRIBUTING.md" class="external-link">Contributing</a>
         | <a href="https://github.com/datacarpentry/sql-ecology-lesson/" class="external-link">Source</a></p>
 				<p><a href="https://github.com/datacarpentry/sql-ecology-lesson/blob/main/CITATION" class="external-link">Cite</a> | <a href="mailto:team@carpentries.org">Contact</a> | <a href="https://carpentries.org/about/" class="external-link">About</a></p>
 			</div>
 			<div class="col-md-6">
-        
+
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
-        
+
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
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   "identifier": "https://datacarpentry.github.io/sql-ecology-lesson/reference.html",
   "dateCreated": "2015-02-10",
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+  "datePublished": "2024-07-09"
 }
 
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diff --git a/sql-cheat-sheet.html b/sql-cheat-sheet.html
index 6a7a9dcf..7e686269 100644
--- a/sql-cheat-sheet.html
+++ b/sql-cheat-sheet.html
@@ -46,7 +46,7 @@
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-      
+
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@@ -170,7 +170,7 @@ <h2 class="accordion-header" id="flush-headingNine">
                 </div><!--/div.accordion-flush-->
               </div><!--div.sidenav-view-selector -->
             </div><!--/div.col -->
-      
+
             <hr></div><!--/div.mobile-row -->
 
           <div class="accordion accordion-flush" id="accordionFlush11">
@@ -189,7 +189,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
     <div class="accordion-header" id="flush-heading1">
         <a href="index.html">Summary and Setup</a>
     </div><!--/div.accordion-header-->
-        
+
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@@ -198,7 +198,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
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         <a href="00-sql-introduction.html">1. Introducing Databases and SQL</a>
     </div><!--/div.accordion-header-->
-        
+
   </div><!--/div.accordion-item-->
 </div><!--/div.accordion-flush-->
 
@@ -207,7 +207,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
     <div class="accordion-header" id="flush-heading3">
         <a href="01-sql-basic-queries.html">2. Accessing Data With Queries</a>
     </div><!--/div.accordion-header-->
-        
+
   </div><!--/div.accordion-item-->
 </div><!--/div.accordion-flush-->
 
@@ -216,7 +216,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
     <div class="accordion-header" id="flush-heading4">
         <a href="02-sql-aggregation.html">3. Aggregating and Grouping Data</a>
     </div><!--/div.accordion-header-->
-        
+
   </div><!--/div.accordion-item-->
 </div><!--/div.accordion-flush-->
 
@@ -225,7 +225,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
     <div class="accordion-header" id="flush-heading5">
         <a href="03-sql-joins.html">4. Combining Data With Joins</a>
     </div><!--/div.accordion-header-->
-        
+
   </div><!--/div.accordion-item-->
 </div><!--/div.accordion-flush-->
 
@@ -257,10 +257,10 @@ <h2 class="accordion-header" id="flush-headingTwelve">
               </div>
             </div>
             <hr class="half-width resources"><a href="aio.html">See all in one page</a>
-            
+
 
             <hr class="d-none d-sm-block d-md-none"><div class="d-grid gap-1">
-            
+
             </div>
           </div><!-- /div.accordion -->
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@@ -288,19 +288,19 @@ <h2 class="accordion-header" id="flush-headingTwelve">
       <hr></nav><main id="main-content" class="main-content"><div class="container lesson-content">
         <h1>SQL Cheat Sheet</h1>
         <p>Last updated on 2023-10-19 |
-        
+
         <a href="https://github.com/datacarpentry/sql-ecology-lesson/edit/main/learners/sql-cheat-sheet.md" class="external-link">Edit this page <i aria-hidden="true" data-feather="edit"></i></a></p>
-        
-        
-        
+
+
+
         <div class="text-end">
           <button role="button" aria-pressed="false" tabindex="0" id="expand-code" class="pull-right" data-expand="Expand All Solutions " data-collapse="Collapse All Solutions "> Expand All Solutions <i aria-hidden="true" data-feather="plus"></i></button>
         </div>
 
         
 
-<section id="basic-queries"><h2 class="section-heading">Basic Queries<a class="anchor" aria-label="anchor" href="#basic-queries"></a>
-</h2>
+<section><h2 class="section-heading" id="basic-queries">Basic Queries<a class="anchor" aria-label="anchor" href="#basic-queries"></a>
+<a class="anchor" aria-label="anchor" href="#basic-queries"></a></h2>
 <hr class="half-width"><p>Select one or more columns of data from a table:</p>
 <div class="codewrapper sourceCode" id="cb1">
 <h3 class="code-label">SH<i aria-hidden="true" data-feather="chevron-left"></i><i aria-hidden="true" data-feather="chevron-right"></i>
@@ -325,8 +325,8 @@ <h3 class="code-label">SH<i aria-hidden="true" data-feather="chevron-left"></i><
 </h3>
 <pre class="sourceCode sh" tabindex="0"><code class="sourceCode bash"><span id="cb4-1"><a href="#cb4-1" tabindex="-1"></a><span class="ex">SELECT</span> column_name_1, ROUND<span class="er">(</span><span class="ex">column_name_2</span> / 1000.0<span class="kw">)</span> <span class="ex">FROM</span> table_name<span class="kw">;</span></span></code></pre>
 </div>
-</section><section id="filtering"><h2 class="section-heading">Filtering<a class="anchor" aria-label="anchor" href="#filtering"></a>
-</h2>
+</section><section><h2 class="section-heading" id="filtering">Filtering<a class="anchor" aria-label="anchor" href="#filtering"></a>
+<a class="anchor" aria-label="anchor" href="#filtering"></a></h2>
 <hr class="half-width"><p>Select only the data meeting certain criteria:</p>
 <div class="codewrapper sourceCode" id="cb5">
 <h3 class="code-label">SH<i aria-hidden="true" data-feather="chevron-left"></i><i aria-hidden="true" data-feather="chevron-right"></i>
@@ -339,8 +339,8 @@ <h3 class="code-label">SH<i aria-hidden="true" data-feather="chevron-left"></i><
 </h3>
 <pre class="sourceCode sh" tabindex="0"><code class="sourceCode bash"><span id="cb6-1"><a href="#cb6-1" tabindex="-1"></a><span class="ex">SELECT</span> <span class="pp">*</span> FROM table_name WHERE <span class="er">(</span><span class="ex">column_name_1</span> <span class="op">&gt;</span>= 1000<span class="kw">)</span> <span class="ex">AND</span> <span class="er">(</span><span class="ex">column_name_2</span> = <span class="st">'A'</span> OR column_name_2 = <span class="st">'B'</span><span class="kw">);</span></span></code></pre>
 </div>
-</section><section id="sorting"><h2 class="section-heading">Sorting<a class="anchor" aria-label="anchor" href="#sorting"></a>
-</h2>
+</section><section><h2 class="section-heading" id="sorting">Sorting<a class="anchor" aria-label="anchor" href="#sorting"></a>
+<a class="anchor" aria-label="anchor" href="#sorting"></a></h2>
 <hr class="half-width"><p>Sort results using <code>ASC</code> for ascending order or
 <code>DESC</code> for descending order:</p>
 <div class="codewrapper sourceCode" id="cb7">
@@ -348,8 +348,8 @@ <h3 class="code-label">SH<i aria-hidden="true" data-feather="chevron-left"></i><
 </h3>
 <pre class="sourceCode sh" tabindex="0"><code class="sourceCode bash"><span id="cb7-1"><a href="#cb7-1" tabindex="-1"></a><span class="ex">SELECT</span> <span class="pp">*</span> FROM table_name ORDER BY column_name_1 ASC, column_name_2 DESC<span class="kw">;</span></span></code></pre>
 </div>
-</section><section id="missing-data"><h2 class="section-heading">Missing Data<a class="anchor" aria-label="anchor" href="#missing-data"></a>
-</h2>
+</section><section><h2 class="section-heading" id="missing-data">Missing Data<a class="anchor" aria-label="anchor" href="#missing-data"></a>
+<a class="anchor" aria-label="anchor" href="#missing-data"></a></h2>
 <hr class="half-width"><p>Use <code>NULL</code> to represent missing data.</p>
 <p><code>NULL</code> is neither true nor false. Operations involving
 <code>NULL</code> produce <code>NULL</code>, e.g., <code>1+NULL</code>,
@@ -367,30 +367,30 @@ <h3 class="code-label">SH<i aria-hidden="true" data-feather="chevron-left"></i><
 </h3>
 <pre class="sourceCode sh" tabindex="0"><code class="sourceCode bash"><span id="cb9-1"><a href="#cb9-1" tabindex="-1"></a><span class="ex">SELECT</span> <span class="pp">*</span> FROM table_name WHERE column_name IS NOT NULL<span class="kw">;</span></span></code></pre>
 </div>
-</section><section id="grouping-and-aggregation"><h2 class="section-heading">Grouping and Aggregation<a class="anchor" aria-label="anchor" href="#grouping-and-aggregation"></a>
-</h2>
+</section><section><h2 class="section-heading" id="grouping-and-aggregation">Grouping and Aggregation<a class="anchor" aria-label="anchor" href="#grouping-and-aggregation"></a>
+<a class="anchor" aria-label="anchor" href="#grouping-and-aggregation"></a></h2>
 <hr class="half-width"><p>Combine data into groups and calculate combined values in groups:</p>
 <div class="codewrapper sourceCode" id="cb10">
 <h3 class="code-label">SH<i aria-hidden="true" data-feather="chevron-left"></i><i aria-hidden="true" data-feather="chevron-right"></i>
 </h3>
 <pre class="sourceCode sh" tabindex="0"><code class="sourceCode bash"><span id="cb10-1"><a href="#cb10-1" tabindex="-1"></a><span class="ex">SELECT</span> column_name_1, SUM<span class="er">(</span><span class="ex">column_name_2</span><span class="kw">)</span><span class="ex">,</span> COUNT<span class="er">(</span><span class="ex">*</span><span class="kw">)</span> <span class="ex">FROM</span> table_name GROUP BY column_name_1<span class="kw">;</span></span></code></pre>
 </div>
-</section><section id="joins"><h2 class="section-heading">Joins<a class="anchor" aria-label="anchor" href="#joins"></a>
-</h2>
+</section><section><h2 class="section-heading" id="joins">Joins<a class="anchor" aria-label="anchor" href="#joins"></a>
+<a class="anchor" aria-label="anchor" href="#joins"></a></h2>
 <hr class="half-width"><p>Join data from two tables:</p>
 <div class="codewrapper sourceCode" id="cb11">
 <h3 class="code-label">SH<i aria-hidden="true" data-feather="chevron-left"></i><i aria-hidden="true" data-feather="chevron-right"></i>
 </h3>
 <pre class="sourceCode sh" tabindex="0"><code class="sourceCode bash"><span id="cb11-1"><a href="#cb11-1" tabindex="-1"></a><span class="ex">SELECT</span> <span class="pp">*</span> FROM table_name_1 JOIN table_name_2 ON table_name_1.column_name = table_name_2.column_name<span class="kw">;</span></span></code></pre>
 </div>
-</section><section id="combining-commands"><h2 class="section-heading">Combining Commands<a class="anchor" aria-label="anchor" href="#combining-commands"></a>
-</h2>
+</section><section><h2 class="section-heading" id="combining-commands">Combining Commands<a class="anchor" aria-label="anchor" href="#combining-commands"></a>
+<a class="anchor" aria-label="anchor" href="#combining-commands"></a></h2>
 <hr class="half-width"><p>SQL commands must be combined in the following order:
 <code>SELECT</code>, <code>FROM</code>, <code>JOIN</code>,
 <code>ON</code>, <code>WHERE</code>, <code>GROUP BY</code>,
 <code>ORDER BY</code>.</p>
-</section><section id="creating-tables"><h2 class="section-heading">Creating Tables<a class="anchor" aria-label="anchor" href="#creating-tables"></a>
-</h2>
+</section><section><h2 class="section-heading" id="creating-tables">Creating Tables<a class="anchor" aria-label="anchor" href="#creating-tables"></a>
+<a class="anchor" aria-label="anchor" href="#creating-tables"></a></h2>
 <hr class="half-width"><p>Create tables by specifying column names and types. Include primary
 and foreign key relationships and other constraints.</p>
 <div class="codewrapper sourceCode" id="cb12">
@@ -404,8 +404,8 @@ <h3 class="code-label">SH<i aria-hidden="true" data-feather="chevron-left"></i><
 <span id="cb12-6"><a href="#cb12-6" tabindex="-1"></a>        <span class="ex">FOREIGN</span> KEY<span class="er">(</span><span class="ex">person</span><span class="kw">)</span> <span class="ex">REFERENCES</span> person<span class="er">(</span><span class="ex">ident</span><span class="kw">)</span></span>
 <span id="cb12-7"><a href="#cb12-7" tabindex="-1"></a><span class="kw">);</span></span></code></pre>
 </div>
-</section><section id="transactions"><h2 class="section-heading">Transactions<a class="anchor" aria-label="anchor" href="#transactions"></a>
-</h2>
+</section><section><h2 class="section-heading" id="transactions">Transactions<a class="anchor" aria-label="anchor" href="#transactions"></a>
+<a class="anchor" aria-label="anchor" href="#transactions"></a></h2>
 <hr class="half-width"><p>Put multiple queries in a transaction to ensure they are ACID
 (atomic, consistent, isolated, and durable):</p>
 <div class="codewrapper sourceCode" id="cb13">
@@ -416,8 +416,8 @@ <h3 class="code-label">SH<i aria-hidden="true" data-feather="chevron-left"></i><
 <span id="cb13-3"><a href="#cb13-3" tabindex="-1"></a>  <span class="ex">INSERT</span> INTO table_name_2 values<span class="er">(</span><span class="ex">...</span><span class="kw">);</span></span>
 <span id="cb13-4"><a href="#cb13-4" tabindex="-1"></a><span class="ex">END</span> TRANSACTION<span class="kw">;</span></span></code></pre>
 </div>
-</section><section id="programming"><h2 class="section-heading">Programming<a class="anchor" aria-label="anchor" href="#programming"></a>
-</h2>
+</section><section><h2 class="section-heading" id="programming">Programming<a class="anchor" aria-label="anchor" href="#programming"></a>
+<a class="anchor" aria-label="anchor" href="#programming"></a></h2>
 <hr class="half-width"><p>Execute queries in a general-purpose programming language by:</p>
 <ul><li>loading the appropriate library</li>
 <li>creating a connection</li>
@@ -464,18 +464,18 @@ <h3 class="code-label">SH<i aria-hidden="true" data-feather="chevron-left"></i><
       		<footer class="row footer mx-md-3"><hr><div class="col-md-6">
         <p>This lesson is subject to the <a href="CODE_OF_CONDUCT.html">Code of Conduct</a></p>
         <p>
-        
+
         <a href="https://github.com/datacarpentry/sql-ecology-lesson/edit/main/learners/sql-cheat-sheet.md" class="external-link">Edit on GitHub</a>
-        
+
 	
         | <a href="https://github.com/datacarpentry/sql-ecology-lesson/blob/main/CONTRIBUTING.md" class="external-link">Contributing</a>
         | <a href="https://github.com/datacarpentry/sql-ecology-lesson/" class="external-link">Source</a></p>
 				<p><a href="https://github.com/datacarpentry/sql-ecology-lesson/blob/main/CITATION" class="external-link">Cite</a> | <a href="mailto:team@carpentries.org">Contact</a> | <a href="https://carpentries.org/about/" class="external-link">About</a></p>
 			</div>
 			<div class="col-md-6">
-        
+
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
-        
+
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
         <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.5" class="external-link">sandpaper (0.16.5)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.3" class="external-link">varnish (1.0.3)</a></p>
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@@ -500,7 +500,7 @@ <h3 class="code-label">SH<i aria-hidden="true" data-feather="chevron-left"></i><
   "identifier": "https://datacarpentry.github.io/sql-ecology-lesson/sql-cheat-sheet.html",
   "dateCreated": "2015-02-10",
   "dateModified": "2023-10-19",
-  "datePublished": "2024-07-02"
+  "datePublished": "2024-07-09"
 }
 
   </script><script>