lass="xref" href="biblio.html#MELT93" title="Understanding the New SQL">[melt93]</a> and <a class="xref" href="biblio.html#DATE97" title="A Guide to the SQL Standard">[date97]</a>.
    You should be aware that some <span class="productname">PostgreSQL</span>
    language features are extensions to the standard.
   </p><p>
    In the examples that follow, we assume that you have created a
    database named <code class="literal">mydb</code>, as described in the previous
    chapter, and have been able to sta