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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>3.1. Introduction</title><link rel="stylesheet" type="text/css" href="stylesheet.css" /><link rev="made" href="[email protected]" /><meta name="generator" content="DocBook XSL Stylesheets Vsnapshot" /><link rel="prev" href="tutorial-advanced.html" title="Chapter 3. Advanced Features" /><link rel="next" href="tutorial-views.html" title="3.2. Views" /></head><body><div xmlns="http://www.w3.org/TR/xhtml1/transitional" class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">3.1. Introduction</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="tutorial-advanced.html" title="Chapter 3. Advanced Features">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="tutorial-advanced.html" title="Chapter 3. Advanced Features">Up</a></td><th width="60%" align="center">Chapter 3. Advanced Features</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 10.23 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="tutorial-views.html" title="3.2. Views">Next</a></td></tr></table><hr></hr></div><div class="sect1" id="TUTORIAL-ADVANCED-INTRO"><div class="titlepage"><div><div><h2 class="title" style="clear: both">3.1. Introduction</h2></div></div></div><p> In the previous chapter we have covered the basics of using
<acronym class="acronym">SQL</acronym> to store and access your data in
<span class="productname">PostgreSQL</span>. We will now discuss some
more advanced features of <acronym class="acronym">SQL</acronym> that simplify
management and prevent loss or corruption of your data. Finally,
we will look at some <span class="productname">PostgreSQL</span>
extensions.
</p><p> This chapter will on occasion refer to examples found in <a class="xref" href="tutorial-sql.html" title="Chapter 2. The SQL Language">Chapter 2</a> to change or improve them, so it will be
useful to have read that chapter. Some examples from
this chapter can also be found in
<code class="filename">advanced.sql</code> in the tutorial directory. This
file also contains some sample data to load, which is not
repeated here. (Refer to <a class="xref" href="tutorial-sql-intro.html" title="2.1. Introduction">Section 2.1</a> for
how to use the file.)
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