54 lines
3.0 KiB
HTML
54 lines
3.0 KiB
HTML
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<title>Example: SQL table UDFs</title>
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<body id="rbafyudftableex"><a name="rbafyudftableex"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Example: SQL table UDFs</h1>
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<div><p>This example illustrates a table function that returns data based
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on a date.</p>
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<div class="section"><pre><strong>CREATE FUNCTION</strong> PROJFUNC(indate <strong>DATE</strong>)
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<strong>RETURNS TABLE</strong> (PROJNO <strong>CHAR</strong>(6), ACTNO <strong>SMALLINT</strong>, ACTSTAFF <strong>DECIMAL</strong>(5,2),
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ACSTDATE <strong>DATE</strong>, ACENDATE <strong>DATE</strong>)
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<strong> LANGUAGE SQL
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BEGIN
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RETURN SELECT</strong> * <strong>FROM</strong> PROJACT
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<strong>WHERE</strong> ACSTDATE<=indate;
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<strong>END</strong></pre>
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</div>
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<div class="section"><p>The function can then be called as:</p>
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<pre><strong>SELECT</strong> * <strong>FROM TABLE</strong>(PROJFUNC(:datehv)) X</pre>
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<p>SQL
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table functions are required to have one and only one RETURN statement.</p>
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</div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rbafyudfsql.htm" title="SQL functions are UDFs that you have defined, written, and registered using the CREATE FUNCTION SQL statement.">Write UDFs as SQL functions</a></div>
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