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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Intro to Databases : Class 1 ~ Girl Develop It</title>
<meta name="description" content="This is the official Girl Develop It Core Intro to Databases course. The course is meant to be taught in four two-hour sessions. Each of the slides and practice files are customizable according to the needs of a given class or audience.">
<meta name="author" content="Girl Develop It">
<meta name="apple-mobile-web-app-capable" content="yes" />
<meta name="apple-mobile-web-app-status-bar-style" content="black-translucent" />
<link rel="stylesheet" href="css/reveal.min.css">
<link rel="stylesheet" href="css/theme/gdiaa.css" id="theme">
<link rel="stylesheet" href="lib/css/light.css">
<link rel="stylesheet" href="css/print/pdf.css" media="print">
<script src="lib/js/head.min.js"></script>
<!--[if lt IE 9]>
<script src="lib/js/html5shiv.js"></script>
<![endif]-->
</head>
<body>
<div class="reveal">
<!-- Any section element inside of this container is displayed as a slide -->
<div class="slides">
<section>
<!-- Welcome & Intros - 20 min -->
<section>
<img src="images/gdi_logo_badge.png" class="img--bare" height="450px" />
<div class="box--small">
<h3><span class="green">Intro to Databases</span></h3>
<h4><span class="blue">Class 1</span></h4>
</div>
</section>
<section>
<h3>About Me</h3>
<div class="left" style="margin-right: 40px"><img src="images/SaraGibbons.jpg" class="img--bare" height="400px" /></div>
<ul class="fa-ul list--bare list--tall box--small">
<li><i class="fa-li fa fa-user"></i><a href="http://saragibby.com">Sara Gibbons</a></li>
<li><i class="fa-li fa fa-mobile"></i><a href="http://quikly.com">Quikly</a></li>
<li><i class="fa-li fa fa-twitter"></i><a href="https://twitter.com/saragibby">@saragibby</a></li>
<li><i class="fa-li fa fa-github"></i><a href="https://github.com/saragibby">github.com/saragibby</a></li>
<li><i class="fa-li fa fa-envelope-o"></i><a href="mailto:[email protected]">[email protected]</a></li>
</u>
</section>
<section>
<h3>Happy Galentine's Day!</h3>
<img src="images/Galentines-Day.jpg" class="img--bare" height="400px" />
</section>
<section>
<h3>Meet The Team!</h3>
<ul class="center-align list--xtall list--bare">
<li>Who are you?</li>
<li>What do you hope to get out of this class?</li>
<li>For fun: what's your favorite breakfast food?</li>
</ul>
</section>
<!-- Setting the Stage - 10 min -->
<section>
<h3>What we will cover today</h3>
<ul class="list--xtall box--small">
<li class ="fragment">What is a database</li>
<li class ="fragment">What is SQL</li>
<li class ="fragment">Installs & setup</li>
<li class ="fragment">Create and load up a sample database</li>
<li class ="fragment">Go through basic commands</li>
</ul>
</section>
</section>
<section>
<h3>What is a Database?</h3>
<ul>
<li>Databases are logically modelled storage spaces</li>
<li>Hold all kinds of different information (data)</li>
</ul>
</section>
<section>
<h3>What is a Database?</h3>
<br/>
<img class="img--bare" src="images/filing-cabinet-open-drawer.png" />
</section>
<section>
<h3>What is a PostreSQL?</h3>
<br/>
<img class="img--bare" src="images/filing-cabinets.png" />
</section>
<section>
<h3>What is a SQL?</h3>
<ul>
<li class ="fragment">SQL - Structured Query Language</li>
<li class ="fragment">Special purpose language for managing data within a relational database</li>
<li class ="fragment">Main language used to manipulate data in database platforms</li>
<li class ="fragment">SQL standard but there are different versions of SQL. All variations support the major commands in a similar manner.</li>
<li class ="fragment">SQL is great to know, because it is <em>everywhere</em>
</ul>
</section>
<section>
<h3>What does SQL do?</h3>
<ul>
<li class ="fragment">Execute queries against a database and retrieve information from a database</li>
<li class ="fragment">Create a new database and create tables in that database</li>
<li class ="fragment">Insert, update and delete records</li>
<li class ="fragment">Create stored procedures and views</li>
<li class ="fragment">Set permissions on database objects</li>
</ul>
</section>
<section>
<h3>Vendors that use SQL</h3>
<ul>
<li>Microsoft SQL Server (T-SQL)</li>
<li>Oracle (PL-SQL)</li>
<li><strong>PostgreSQL</strong></li>
<li>MySQL</li>
<li>DB2 (IBM Product)</li>
<li>Sybase</li>
<li>Microsoft Azure</li>
</ul>
</section>
<section>
<h3>Why PostgreSQL?</h3>
<ul>
<li class ="fragment">Great platform to use for learning SQL</li>
<li class ="fragment">Huge community support</li>
<li class ="fragment">Widely used in the industry and easy to use with various applications</li>
<li class ="fragment">It is open source</li>
</ul>
</section>
<section>
<h3>Installing PostgreSQL</h3>
<h4 class="green">Mac</h4>
<a class="copy--small" href="http://bit.ly/pg-install-mac" target = "_blank">http://bit.ly/pg-install-mac</a>
<br /><br /><br />
<h4 class="green">Windows</h4>
<a class="copy--small" href="http://bit.ly/pg-install-windows" target="_blank">
http://bit.ly/pg-install-windows</a>
</section>
<section>
<h3>Open PostgreSQL Terminal</h3>
<h4 class="green">Mac</h4>
<img src="images/mac-postgres-menu.png" class="left img--bare"/>
<img src="images/mac-postgres-terminal.png" style="width: 50%" class="pull-right img--bare"/>
</section>
<section>
<h3>Open PostgreSQL Terminal</h3>
<h4 class="green">Windows</h4>
<img src="images/windows-psql-menu.jpg" style="width: 30%" class="left img--bare"/>
<img src="images/windows-psql-terminal.png" style="width: 60%" class="pull-right img--bare"/>
</section>
<section>
<h3>Let's Develop It!</h3>
<p>Spend a few minutes to get familiar with psql.<p>
<br/>
<ul>
<li><strong>Open postgres</strong>: <code>psql</code>
<br/>
<li>List databases: <code>\l</code> or <code>\list</code></li>
<li>Help: <code>\h</code> or <code>\help</code></li>
<li>Command help: <code>\h SELECT</code> or <code>\help SELECT</code></li>
</ul>
</section>
<section>
<h3>Quit/Exit PostgreSQL</h3>
<p>To quit the database terminal use: <code>\q</code> or <code>\quit</code></p>
<img src="images/terminal-quit.png" class="img--bare"/>
</section>
<section>
<h3>Installing pgAdmin</h3>
<p>An app to interact with the PostgreSQL database, without the Terminal.</p>
<h4 class="green">Mac</h4>
<a class="copy--small" href="http://bit.ly/pg-admin-mac" target = "_blank">http://bit.ly/pg-admin-mac</a>
<br /><br /><br />
<h4 class="green">Windows</h4>
<a class="copy--small" href="http://bit.ly/pg-admin-windows" target="_blank">
http://bit.ly/pg-admin-windows</a>
</section>
<section>
<h3>pgAdmin - Setup Local Server</h3>
<img src="images/pg-admin-home.png" class="img--bare"/>
</section>
<section>
<h3>pgAdmin - Setup Local Server</h3>
<img src="images/pg-admin-add-server-1.png" style="width: 40%" class="left img--bare"/>
<img src="images/pg-admin-add-server-2.png" style="width: 40%" class="pull-right img--bare"/>
</section>
<section>
<h3>Relational Databases</h3>
<ul>
<li class ="fragment">Is a database whose organization is based on the relational model</li>
<li class ="fragment">This model organizes data into tables of rows and columns, with a unique key for each row</li>
<li class ="fragment">Tables store unique keys from other tables, which allows tables to be linked/related</li>
</ul>
</section>
<section>
<h3>Let's Develop It!</h3>
<p>Create a sample database and fill it with data.<p>
<br/>
<p>Download install files from: <a href="http://bit.ly/gdiaa-dvdrental">http://bit.ly/gdiaa-dvdrental</a></p>
<br />
<h4 class="green">Couple Ways to Load Sample Database...</h4>
<ol>
<li><code>psql</code> Prompt</li>
<li>Restore in pgAdmin</li>
</ol>
</section>
<section>
<h3>Let's Develop It!</h3>
<h4 class="green">From <code>psql</code> Prompt</h4>
<br/>
<p>Open Terminal go to where you downloaded the <strong>dvdrental.tar</strong> file.</p>
<code>createdb dvdrental</code>
<br/>
<code>pg_restore -d dvdrental dvdrental.tar</code>
</section>
<section>
<section>
<h3>Let's Develop It!</h3>
<br/>
<h4 class="green">Restore in pgAdmin</h4>
<ol>
<li>Create <code>dvdrental</code> database</li>
<li>Pick option to "Restore" to that database</li>
<li>Select <code>dvdrental.tar</code> </li>
</ol>
</section>
<section>
<h3>Let's Develop It!</h3>
<img src="images/create-database-option.png" class="left img--bare"/>
<img src="images/create-database.png" style="width: 45%" class="pull-right img--bare" />
</section>
<section>
<h3>Let's Develop It!</h3>
<img src="images/restore-database-option.png" class="left img--bare"/>
<img src="images/select-tar-from-all-files.png" style="width: 60%" class="pull-right img--bare" />
</section>
</section>
<section>
<h3>Let's Develop It!</h3>
<p>Checkout our dvdrental database in pgAdmin.<p>
<ol>
<li>Open <strong>pgAdmin</strong> tool</li>
<li>Expand <strong>Servers</strong></li>
<li>Expand <strong>localhost</strong></li>
<li>Expand <strong>Databases</strong></li>
<li>Expand our new database <strong>dvdrental</strong></li>
<ol>
</section>
<section>
<h3>Pieces and parts of a relational database</h3>
<p>A relational database consists of many different elements, some of which include: </p>
<div style="float: left; width: 50%;" class="copy--small">
<ul>
<li>schema</li>
<li>tables</li>
<li>views</li>
<li>relationships</li>
<li>indexes</li>
</ul>
</div>
<div style="float: left; width: 50%;" class="copy--small">
<ul>
<li>functions</li>
<li>stored procedures</li>
<li>triggers</li>
<li>server objects</li>
<li>and other elements</li>
</ul>
</div>
</section>
<section>
<h3>Schema</h3>
<ul>
<li class ="fragment">Is a way to logically group database objects</li>
<li class ="fragment">Acts as a blueprint for how the database is constructed</li>
<li class ="fragment">In a relational database, the schema defines relationships, tables, fields in tables etc.</li>
</ul>
</section>
<section>
<h3>Tables</h3>
<p>In a relational database, a table is an organized set of data using columns and rows.</p>
<img src="images/table.gif" class="img--bare" />
<p>You may sometimes hear a table referred to as a "relation".</p>
</section>
<section>
<h3>Let's Develop It!</h3>
<p>Spend a few minutes exploring DVD Rental database<p>
<ol>
<li>Expand <strong>Schemas</strong></li>
<li>Checkout <strong>Tables</strong></li>
<li>Right click on a table, select option to view data</li>
</ol>
</section>
<section>
<h3>The SELECT Statement</h3>
<ul>
<li class ="fragment">We use the <code>SELECT</code> command to show/query data from a database</li>
<li class ="fragment">The output from a <code>SELECT</code> statement is always a grid of rows and columns.</li>
<li class ="fragment">The most simple <code>SELECT</code> statement retrieves all values from a single table</li>
<li class ="fragment"><code>SELECT</code> columns <code>FROM</code> database</li>
</ul>
</section>
<section>
<h3>Let's Develop It!</h3>
<p>Explore the dvdrental tables & data.</p>
<ul style="width: 50%">
<li>Right-click on <strong>dvdrental</strong></li>
<li>Select <strong>Query Tool</strong></li>
</ul>
<br/><br/>
<p class="copy--small" style="width: 50%; padding-left: 20px"><span class="green"><em>Note:</em></span> SQL is not case sensitive</p>
<pre><code contenteditable class="JavaScript">SELECT * FROM actor;
</code></pre>
<p>This will return all of the results from the actor table.</p>
</section>
<section>
<h3>SELECT DISTINCT</h3>
<p><code>DISTINCT</code> keyword is used to return only distinct values, if there are duplicate values</p>
<p class="copy--small left-align"><span class="green"><em>Note:</em></span> Some database systems require a semi colon after each SQL statement. PostgreSQL is one of them.</p>
<div class="box--small"><pre><code contenteditable class="terminal">SELECT distinct first_name FROM actor;
</code></pre></div>
<p>This will return a distinct list of first names from the actor table in the dvdrentals db</p>
</section>
<section>
<h3>The WHERE Clause</h3>
<p class="copy--small">Returns a subset of rows filtered on the <code>WHERE</code> clause criteria</p>
<p class="copy--small"><code>SELECT</code> .. <code>WHERE</code> statement can be made on one line:</p>
<br/>
<p class="copy--small left-align" style="padding-left: 20px"><span class="green"><em>Note:</em></span> PostgreSQL uses double-quotes to look for internal database object. Use single-quote to wrap string values.</p>
<pre><code contenteditable class="JavaScript">SELECT * FROM actor WHERE first_name = 'Bette';</code></pre>
</section>
<section>
<h3>WHERE Clause Operators</h3>
<table style="font-size: 20px; line-height: 1.4em;">
<tr>
<td><strong>Operator</strong></td>
<td><strong>Description</strong></td>
</tr>
<tr>
<td>=</td>
<td>Equal</td>
</tr>
<tr>
<td><></td>
<td>Not equal. <em>Note:</em> In some versions of SQL, this may be written as !=</td>
</tr>
<tr>
<td>></td>
<td>Greater than</td>
</tr>
<tr>
<td><</td>
<td>Less than</td>
</tr>
<tr>
<td>>=</td>
<td>Greater than or equal</td>
</tr>
<tr>
<td><=</td>
<td>Less than or equal</td>
</tr>
<tr>
<td>BETWEEN</td>
<td>Between an inclusive range</td>
</tr>
<tr>
<td>LIKE</td>
<td>Search for a pattern (can use a wildcard character)</td>
</tr>
<tr>
<td>IN</td>
<td>To specify multiple possible values for a column</td>
</tr>
</table>
</section>
<section>
<h3>Not Equal</h3>
<pre><code contenteditable class="JavaScript">SELECT * FROM actor WHERE first_name <> 'Catherine';
</code></pre>
</section>
<section>
<h3>Greater Than</h3>
<pre><code contenteditable class="JavaScript">SELECT * FROM rental WHERE rental_date > '2005-12-31';
</code></pre>
</section>
<section>
<h3>Less Than</h3>
<pre><code contenteditable class="JavaScript">SELECT * FROM film WHERE rental_duration < 4;
</code></pre>
</section>
<section>
<h3>BETWEEN</h3>
<pre><code contenteditable class="JavaScript">SELECT * FROM film WHERE replacement_cost BETWEEN 21.99 AND 24.99;
</code></pre>
</section>
<section>
<h3>LIKE</h3>
<p>Uses the wildcard character</p>
<pre><code contenteditable class="JavaScript">SELECT * FROM customer WHERE last_name LIKE '%Will%';
</code></pre>
<p>Can use the character at the beginning or end of the word/phrase</p>
<pre><code contenteditable class="JavaScript">SELECT * FROM customer WHERE last_name LIKE 'Will%';
</code></pre>
</section>
<section>
<h3>IN</h3>
<pre><code contenteditable class="JavaScript">SELECT * FROM film WHERE rating IN ('G', 'PG');
</code></pre>
</section>
<section>
<h3>Let's Develop It!</h3>
<ul>
<li>Spend some time writing SELECT statements with WHERE clauses</li>
<li>Feel free to work with a neighbor!</li>
<li>Practice Problems:</li>
<ul>
<li>Return all films that have an id greater than 900</li>
<li>Return all customers with a Last name of 'Smith'</li>
<li>Return all payment over 7 dollars</li>
</ul>
</ul>
</section>
<section>
<section>
<h3>Questions?</h3>
</section>
<section>
<h3>Homework</h3>
<p>Explore your sample dvdrental database.<br/>Get familiar with pgAdmin. Play. Have fun!</p>
<br/><br/>
<h3>Resources</h3>
<ul style="width: 50%">
<li><a href="http://www.tutorialspoint.com/postgresql/">Tutorials Point</a></li>
<li><a href="http://www.w3schools.com/sql/">W3 Schools Tutorials</a></li>
</ul>
</section>
<section>
<img src="images/gdi_logo_badge.png" class="img--bare" height="450px" />
<div class="box--small">
<h3><span class="green">Intro to Databases</span></h3>
<h4><span class="blue">Class 1</span></h4>
</div>
</section>
</section>
<!--
<section>
<h3>Data Control Language (DCL)</h3>
<p>Used to control access to data<p>
<ul>
<li>GRANT</li>
<li>REVOKE</li>
</ul>
</section> -->
<!-- <section>
<h3>Transaction Control Language (TCL)</h3>
<p>Used to control transactional processing of data<p>
<ul>
<li>COMMIT</li>
<li>SAVEPOINT</li>
<li>ROLLBACK</li>
<li>SET TRANSACTION (isolation level)</li>
</ul>
</section> -->
</div>
<footer>
<div class="copyright">
Intro to Databases ~ GDI Ann Arbor ~
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dependencies: [
{ src: 'lib/js/classList.js', condition: function() { return !document.body.classList; } },
{ src: 'plugin/markdown/showdown.js', condition: function() { return !!document.querySelector( '[data-markdown]' ); } },
{ src: 'plugin/markdown/markdown.js', condition: function() { return !!document.querySelector( '[data-markdown]' ); } },
{ src: 'plugin/highlight/highlight.js', async: true, callback: function() { hljs.initHighlightingOnLoad(); } },
{ src: 'plugin/zoom-js/zoom.js', async: true, condition: function() { return !!document.body.classList; } },
{ src: 'plugin/notes/notes.js', async: true, condition: function() { return !!document.body.classList; } }
]
});
</script>
</body>
</html>