57 lines
3.6 KiB
HTML
57 lines
3.6 KiB
HTML
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<meta name="DC.Type" content="reference" />
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<meta name="DC.Title" content="Write UDFs as SQL functions" />
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<meta name="abstract" content="SQL functions are UDFs that you have defined, written, and registered using the CREATE FUNCTION SQL statement." />
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<meta name="description" content="SQL functions are UDFs that you have defined, written, and registered using the CREATE FUNCTION SQL statement." />
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<meta name="DC.subject" content="UDFs (User-defined functions), writing your own UDF, SQL" />
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<meta name="keywords" content="UDFs (User-defined functions), writing your own UDF, SQL" />
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<meta name="DC.Relation" scheme="URI" content="rbafyudf.htm" />
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<meta name="DC.Relation" scheme="URI" content="rbafyscalarudf.htm" />
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<title>Write UDFs as SQL functions</title>
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</head>
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<body id="rbafyudfsql"><a name="rbafyudfsql"><!-- --></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">Write UDFs as SQL functions</h1>
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<div><p>SQL functions are UDFs that you have defined, written, and registered
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using the CREATE FUNCTION SQL statement.</p>
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<div class="section"><p>As such, they are written using only the SQL language and their
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definition is completely contained within one (potentially large) CREATE FUNCTION
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statement. The creation of an SQL function causes the registration of the
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UDF, generates the executable code for the function, and defines to the database
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the details of how parameters are passed.</p>
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</div>
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</div>
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<div>
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<ul class="ullinks">
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<li class="ulchildlink"><strong><a href="rbafyscalarudf.htm">Example: SQL scalar UDFs</a></strong><br />
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In this example, a function returns a priority based on a date.</li>
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<li class="ulchildlink"><strong><a href="rbafyudftableex.htm">Example: SQL table UDFs</a></strong><br />
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This example illustrates a table function that returns data based on a date.</li>
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</ul>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rbafyudf.htm" title="In writing SQL applications, you can implement some actions or operations as a UDF or as a subroutine in your application: Although it may appear easier to implement new operations as subroutines in your application, you might want to consider the advantages of using a UDF instead.">Use user-defined functions (UDFs)</a></div>
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