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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>MongoDB Introduction</title>
<meta name="description" content="MongoDB Introduction">
<meta name="author" content="Luis Ibanez">
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</head>
<body>
<div class="reveal">
<!-- Any section element inside of this container is displayed as a slide -->
<div class="slides">
<section>
<h1>MongoDB</h1>
<h2>Introduction</h2>
<p>
<small>Created by <a href="https://opensource.com/users/luis-ibanez">Luis Ibanez</a></small>
</p>
</section>
<section>
<span xmlns:dct="http://purl.org/dc/terms/" href="http://purl.org/dc/dcmitype/InteractiveResource" property="dct:title" rel="dct:type">MongoDB Introduction</span>
<br>
by
<span xmlns:cc="http://creativecommons.org/ns#" property="cc:attributionName">Luis Ibanez</span>
<br>
is licensed under a
<br>
<a rel="license" href="http://creativecommons.org/licenses/by/3.0/deed.en_US">
<img alt="Creative Commons License" style="border-width:0" src="http://i.creativecommons.org/l/by/3.0/88x31.png" />
</a>
<br>
<a rel="license" href="http://creativecommons.org/licenses/by/4.0/deed.en_US">Creative Commons by Attribution 4.0 License</a>
<br>
<a rel="license" href="http://www.apache.org/licenses/LICENSE-2.0">
<img alt="Apache 2.0 License" style="border-width:0" src="http://www.apache.org/images/feather-small.gif" />
</a>
<br>
<a rel="license" href="http://www.apache.org/licenses/LICENSE-2.0">Apache 2.0 License</a>
</section>
<section>
<h2>MongoDB</h2>
<h3>Introduction</h3>
</section>
<section>
<a href="#" class="image">
<img width="572" src="http://upload.wikimedia.org/wikipedia/en/thumb/e/eb/MongoDB_Logo.png/640px-MongoDB_Logo.png" alt="MongoDB Logo">
</a>
<p><a href="http://www.mongodb.org/about/introduction/">MongoDB</a></p>
</section>
<section>
<h3>MongoDB</h3>
<p>is a</p>
<h3>Document Database</h3>
</section>
<section>
<h2>The</h2>
<h2>Data</h2>
<h2>Model</h2>
</section>
<section>
<p>Starts</p>
<p>with a</p>
<p>"Database"</p>
</section>
<section>
<p>a "Database"</p>
<p>contains</p>
<p>"Collections"</p>
</section>
<section>
<p>a "Collection"</p>
<p>contains</p>
<p>"Documents"</p>
</section>
<section>
<p>a "Document"</p>
<p>contains</p>
<p>"Fields"</p>
</section>
<section>
<p>a "Field"</p>
<p>is a</p>
<p>"key-value" pair</p>
</section>
<section>
<p>MongoDB</p>
<p>uses</p>
<p>JSON</p>
</section>
<section>
<p>a "key-value" pair</p>
<p>uses the JSON notation</p>
<p>'key' : 'value'</p>
</section>
<section>
<h3>Time to</h3>
<h3>Travel</h3>
</section>
<section>
<p>Think of a Country and City</p>
<p>that you would like to visit</p>
<p>if someone else is paying for the trip.</p>
</section>
<section>
<p>From the Command Line</p>
<p>open the INF202World database:</p>
<pre><code data-trim contenteditable>
mongo INF202World
</code></pre>
</section>
<section>
<p>See the available collections</p>
<pre><code data-trim contenteditable>
show collections
</code></pre>
</section>
<section>
<p>One of the collections</p>
<p>is called</p>
<p>"cities"</p>
</section>
<section>
<p>See if your city exists</p>
<pre><code data-trim contenteditable>
db.cities.find( { 'name' : 'New York' } )
</code></pre>
<p>but of course, use your city's names</p>
</section>
<section>
<p>If your city exists,</p>
<p>pick another one</p>
<p>that is not in the collection.</p>
</section>
<section>
<p>Insert your new city</p>
<pre><code data-trim contenteditable>
db.cities.insert( { 'name' : 'Emerald City' } )
</code></pre>
<p>but of course, use your city's names</p>
</section>
<section>
<p>Verify that it worked</p>
<pre><code data-trim contenteditable>
db.cities.find( { 'name' : 'Emerald City' } )
</code></pre>
<p>but of course, use your city's names</p>
</section>
<section>
<p>See all the city names</p>
<pre><code data-trim contenteditable>
db.cities.find( {}, { 'name' : 1 } )
</code></pre>
</section>
<section>
<p>The "find"</p>
<p>function</p>
<p>has two arguments</p>
</section>
<section>
<p>The two arguments are:</p>
<pre><code data-trim contenteditable>
db.cities.find( filter, question )
</code></pre>
<p>No need to type this in MongoDB</p>
</section>
<section>
<p>The "filter"</p>
<p>argument</p>
<p>narrows the search</p>
</section>
<section>
<p>The "question"</p>
<p>argument</p>
<p>selects the fields</p>
<p>we want to get back</p>
</section>
<section>
<p>When we do</p>
<pre><code data-trim contenteditable>
db.cities.find( {}, { 'name' : 1 } )
</code></pre>
<p>the "filter" is empty</p>
<p>so we are getting all cities (document)</p>
<p>from the collection</p>
</section>
<section>
<p>Exit MongoDB shell</p>
<pre><code data-trim contenteditable>
exit
</code></pre>
</section>
<section>
<h3>Breath!</h3>
</section>
<section>
<h3>Smile!</h3>
</section>
<section>
<p>open again the INF202World database:</p>
<pre><code data-trim contenteditable>
mongo INF202World
</code></pre>
</section>
<section>
<p>See the available collections</p>
<pre><code data-trim contenteditable>
show collections
</code></pre>
</section>
<section>
<p>See again your city's data</p>
<pre><code data-trim contenteditable>
db.cities.find( { 'name' : 'New York' } )
</code></pre>
<p>but of course, use your city's names</p>
</section>
<section>
<p>Let's add more to it.</p>
<p>Update the document with the country.</p>
<pre><code data-trim contenteditable>
db.cities.update( { 'name' : 'New York' }, { $set : { 'country' : 'USA' } } )
</code></pre>
<p>but of course, use your city's names</p>
<p>and it's respective country.</p>
</section>
<section>
<p>Note the '$set' operator.</p>
<pre><code data-trim contenteditable>
db.cities.update( { 'name' : 'New York' }, { $set : { 'country' : 'USA' } } )
</code></pre>
<p>It is VERY important.</p>
</section>
<section>
<p>Without the '$set' operator</p>
<p>the new data will</p>
<p>REPLACE</p>
<p>the existing data.</p>
</section>
<section>
<p>Check again your city's data</p>
<pre><code data-trim contenteditable>
db.cities.find( { 'name' : 'New York' } )
</code></pre>
<p>but of course, use your city's names</p>
</section>
<section>
<p>WARNING:</p>
<p>if at anytime you get the prompt</p>
<pre><code data-trim contenteditable>
...
</code></pre>
<p>It means that you may not have closed all the {} or () or "".</p>
</section>
<section>
<p>The "update"</p>
<p>function</p>
<p>has two arguments</p>
</section>
<section>
<p>The two arguments are:</p>
<pre><code data-trim contenteditable>
db.cities.find( filter, newdata )
</code></pre>
<p>No need to type this in MongoDB</p>
</section>
<section>
<p>The "filter"</p>
<p>argument</p>
<p>narrows the search</p>
</section>
<section>
<p>The "newdata"</p>
<p>argument</p>
<p>provides data to be added</p>
<p>or to replace current data</p>
</section>
<section>
<p>If "newdata"</p>
<p>uses</p>
<p>$set</p>
<p>then data will be added</p>
</section>
<section>
<p>If "newdata"</p>
<p>does not use</p>
<p>$set</p>
<p>then data will be replaced</p>
</section>
<section>
<p>Let's add food data.</p>
<pre><code data-trim contenteditable>
db.cities.update( { 'name' : 'New York' },
{ $set : { 'food' : [
'pizza',
'sandwich'
]
}
}
)
</code></pre>
<p>but of course, use your city's typical food</p>
</section>
<section>
<p>Check again your city's data</p>
<pre><code data-trim contenteditable>
db.cities.find( { 'name' : 'New York' } )
</code></pre>
<p>but of course, use your city's names</p>
</section>
<section>
<h3>Your</h3>
<h3>Turn !</h3>
</section>
<section>
<p>Find all cities in a country</p>
<pre><code data-trim contenteditable>
db.cities.find( { 'country' : 'USA' } )
</code></pre>
</section>
<section>
<p>Find all cities in a country</p>
<p>and get only their names</p>
<pre><code data-trim contenteditable>
db.cities.find( { 'country' : 'USA' }, { 'name' : 1 } )
</code></pre>
</section>
<section>
<p>Find all cities in a country</p>
<p>and get only their names</p>
<p>without their _id</p>
<pre><code data-trim contenteditable>
db.cities.find( { 'country' : 'USA' }, { 'name' : 1, '_id' : 0 } )
</code></pre>
</section>
<section>
<p>The same can be written</p>
<p>using multiple lines</p>
<pre><code data-trim contenteditable>
db.cities.find(
{
'country' : 'USA'
},
{
'name' : 1,
'_id' : 0
}
)
</code></pre>
</section>
<section>
<p>Find all cities</p>
<p>in the same country</p>
<p>as your city</p>
</section>
<section>
<p>Every city</p>
<p>is a MongoDB</p>
<p>"Document"</p>
</section>
<section>
<p>The group of cities</p>
<p>is a MongoDB</p>
<p>"Collection"</p>
</section>
<section>
<h3>Let's Add</h3>
<h3>More</h3>
</section>
<section>
<p>Visit the</p>
<p>Wikipedia page</p>
<p>of your city.</p>
</section>
<section>
<p>Select information</p>
<p>to add to the</p>
<p>MongoDB Document.</p>
</section>
<section>
<p>Some pieces of data</p>
<p>will be</p>
<p>properties</p>
<p>in key:value format.</p>
</section>
<section>
<p>Some pieces of data</p>
<p>will be</p>
<p>in key:array format.</p>
</section>
<section>
<h3>Breath!</h3>
</section>
<section>
<h3>Smile!</h3>
</section>
</div>
</div>
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