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<title>About Procedural Language/SQL (PL/SQL)</title>
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<h1>About Procedural Language/SQL (PL/SQL)</h1>
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<p><span class="bold"><a id="sthref19" name="sthref19"></a>Procedural Language/SQL (<a id="sthref20" name="sthref20"></a>PL/SQL)</span> (pronounced <span class="italic">P L sequel</span>) is a native Oracle Database extension to SQL. It bridges the gap between declarative and imperative program control by adding procedural elements, such as conditional control and loops.</p>
<p>In PL/SQL, you can declare constants and variables, procedures and functions, types and variables of those types, and triggers. You can handle exceptions (run-time errors). You can create <a id="sthref21" name="sthref21"></a>PL/SQL units&mdash;procedures, functions, packages, types, and triggers&mdash;that are stored in the database for reuse by applications that use any of the Oracle Database programmatic interfaces.</p>
<p>The basic unit of a PL/SQL source program is the <a id="sthref22" name="sthref22"></a><a id="sthref23" name="sthref23"></a>block, which groups related declarations and statements. A block has an optional <a id="sthref24" name="sthref24"></a>declarative part, a required <a id="sthref25" name="sthref25"></a>executable part, and an optional <a id="sthref26" name="sthref26"></a>exception-handling part.</p>
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<p><a href="javascript:open('http://www.oracle.com/pls/db112/lookup?id=CNCPT416','newWindow').focus()"><span class="italic">Oracle Database Concepts</span></a></p>
<p><a href="javascript:open('http://www.oracle.com/pls/db112/lookup?id=LNPLS','newWindow').focus()"><span class="italic">Oracle Database PL/SQL Language Reference</span></a></p>
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