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<h1 class="topictitle1">Example: SQL scalar UDFs</h1>
<div><p>In this example, a function returns a priority based on a date.</p>
<div class="section"><pre><strong>CREATE FUNCTION</strong> PRIORITY(indate <strong>DATE</strong>) <strong>RETURNS CHAR</strong>(7)
<strong>LANGUAGE SQL
BEGIN
RETURN(</strong>
<strong>CASE</strong> <strong>WHEN</strong> indate><strong>CURRENT DATE</strong>-3 <strong>DAYS THEN</strong> 'HIGH'
<strong>WHEN</strong> indate><strong>CURRENT DATE</strong>-7 <strong>DAYS THEN</strong> 'MEDIUM'
<strong>ELSE</strong> 'LOW'
<strong>END</strong>
);
<strong>END</strong></pre>
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<div class="section"><p>The function can then be called as:</p>
<pre><strong>SELECT</strong> ORDERNBR, PRIORITY(ORDERDUEDATE) <strong>FROM</strong> ORDERS</pre>
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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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