le" style="clear: both">3.1. Introduction <a href="#TUTORIAL-ADVANCED-INTRO" class="id_link">#</a></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 a