diff --git a/00-sql-introduction.md b/00-sql-introduction.md
index aae78860..97b46627 100644
--- a/00-sql-introduction.md
+++ b/00-sql-introduction.md
@@ -178,6 +178,16 @@ To summarize:
   - Split into separate tables with one table per class of information
   - Needs an identifier in common between tables – shared column - to
     reconnect (known as a *foreign key*).
+	
+:::::::::::::::::::::::::::::::::::::::::  callout
+
+### SQL vs. NoSQL
+
+SQL is not the only tool for managing and analyzing large amounts of data. As described above, SQL databases store data in tables using a rigid schema. This works well for many applications, but larger, more complex projects may benefit from the more flexible approach provided by NoSQL databases. 
+
+NoSQL databases are diverse, employing a variety of data structures tailored to specific use cases, but in general provide a scalable way to store, search, and establish relationships within large datasets that cannot easily be represented by a rigid, tabular schema. A more thorough discussion of the differences between SQL and NoSQL is beyond the scope of this lesson, but curious readers can start with [this comparison](https://www.mongodb.com/nosql-explained/nosql-vs-sql) by MongoDB, a NoSQL database vendor.
+
+::::::::::::::::::::::::::::::::::::::::::::::::::
 
 ### Import
 
diff --git a/md5sum.txt b/md5sum.txt
index c6f539dc..884215ef 100644
--- a/md5sum.txt
+++ b/md5sum.txt
@@ -5,7 +5,7 @@
 "NEWS.md" "84aa522251c8b0043f12e83af45cc3d8" "site/built/NEWS.md" "2023-04-21"
 "config.yaml" "0928fbefeca4f51e54ccc3687a9565e9" "site/built/config.yaml" "2023-04-21"
 "index.md" "cfdee7444b27a96171c25e1d4915e1e9" "site/built/index.md" "2023-06-07"
-"episodes/00-sql-introduction.md" "702a6c1b841bc4729bb2d8e0b358532e" "site/built/00-sql-introduction.md" "2023-04-21"
+"episodes/00-sql-introduction.md" "bc3292402fa8987d6a183509b126606f" "site/built/00-sql-introduction.md" "2024-01-09"
 "episodes/01-sql-basic-queries.md" "31fc6d3e21d679cab6a002bffe7c182d" "site/built/01-sql-basic-queries.md" "2023-04-21"
 "episodes/02-sql-aggregation.md" "07784e3014a42660059c18e6ba71f26d" "site/built/02-sql-aggregation.md" "2023-04-21"
 "episodes/03-sql-joins.md" "4c87f9451d13eaa88c1b38fe29c7a7f3" "site/built/03-sql-joins.md" "2023-06-30"