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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <script src="./callback.js" type="text/javascript"></script> <noscript>Your browser does not support JavaScript. This help page requires JavaScript to render correctly.</noscript> </head> <meta http-equiv="Content-Type" content="text/html; charset=us-ascii" /> <meta http-equiv="Content-Style-Type" content="text/css" /> <meta http-equiv="Content-Script-Type" content="text/javascript" /> <meta name="generator" content="Oracle DARB XHTML Converter (Mode = ohj/ohw) - Version 5.1.1 Build 005" /> <meta name="date" content="2009-04-21T9:46:24Z" /> <meta name="robots" content="noarchive" /> <meta name="doctitle" content="Tutorial: Creating a Standalone Stored Function" /> <meta name="relnum" content="11g Release 2 (11.2)" /> <meta name="partnum" content="E10766-01" /> <link rel="copyright" href="./dcommon/html/cpyr.htm" title="Copyright" type="text/html" /> <link rel="stylesheet" href="./dcommon/css/blafdoc.css" title="Oracle BLAFDoc" type="text/css" /> <link rel="contents" href="toc.htm" title="Contents" type="text/html" /> <link rel="prev" href="tdddg_subprograms007.htm" title="Previous" type="text/html" /> <link rel="next" href="tdddg_subprograms009.htm" title="Next" type="text/html" /> <title>Tutorial: Creating a Standalone Stored Function</title> </head> <body> <div class="zz-skip-header"><a href="#BEGIN">Skip Headers</a></div> <table class="simple oac_no_warn" summary="" cellspacing="0" cellpadding="0" width="100%"> <col width="86%" /> <col width="*" /> <tr valign="bottom"> <td align="left"></td> <td align="center"><a href="tdddg_subprograms007.htm"><img width="24" height="24" src="./dcommon/gifs/leftnav.gif" alt="Previous" /><br /> <span class="icon">Previous</span></a> </td> <td align="center"><a href="tdddg_subprograms009.htm"><img width="24" height="24" src="./dcommon/gifs/rightnav.gif" alt="Next" /><br /> <span class="icon">Next</span></a></td> </tr> </table> <p><a id="BABCIEHF" name="BABCIEHF"></a><a id="TDDDG99984" name="TDDDG99984"></a></p> <div class="sect2"><!-- infolevel="all" infotype="General" --> <h1>Tutorial: Creating a Standalone Stored Function</h1> <a name="BEGIN" id="BEGIN"></a> <p>To create a <a id="sthref358" name="sthref358"></a>standalone stored function, use either the SQL Developer tool <a id="sthref359" name="sthref359"></a>Create PL/SQL Function or the DDL statement <a id="sthref360" name="sthref360"></a><code>CREATE</code> <code>FUNCTION</code>.</p> <p>This tutorial shows how to use the Create PL/SQL Function tool to create a standalone stored function named <a id="sthref361" name="sthref361"></a><code>calculate_score</code> that has three parameters and returns a value of type <code>NUMBER</code>.</p> <a id="TDDDG216" name="TDDDG216"></a> <p class="subhead2">To create a standalone stored function using Create PL/SQL Function tool:</p> <ol> <li> <p>On the Connections tab, expand <span class="bold">hr_conn</span>.</p> <p>Under the <code>hr_conn</code> icon, a list of schema object types appears.</p> </li> <li> <p>Right-click <span class="bold">Functions</span>.</p> <p>A list of choices appears.</p> </li> <li> <p>Click <span class="bold">New Function</span>.</p> <p>The Create PL/SQL Function window opens. It looks like the Create PL/SQL Procedure window (see <a href="tdddg_subprograms007.htm#BABDHFAC">"Tutorial: Creating a Standalone Stored Procedure"</a>) except that its Parameters pane has a row for the value that the function returns. In that row, the value of Name is <code><Return></code> and the default value of Type is <code>VARCHAR2</code>.</p> </li> <li> <p>For Schema, accept the default value, <code>HR</code>.</p> </li> <li> <p>For Name, change <code>FUNCTION1</code> to <code>calculate_score</code>.</p> </li> <li> <p>In the Parameters pane, in the Type field of the only row, select <code>NUMBER</code> from the drop-down list.</p> </li> <li><a id="BABBECCF" name="BABBECCF"></a> <p>Click the icon <span class="bold">Add Column</span>.</p> <p>A row appears under the column headings. Its fields have these default values: Name, <code>param1</code>; Type, <code>VARCHAR2</code>; Mode, <code>IN</code>; Default Value, empty.</p> </li> <li> <p>For Name, change <code>param1</code> to <code>cat</code>.</p> </li> <li> <p>For Type, accept the default, <code>VARCHAR2</code>.</p> </li> <li> <p>For Mode, accept the default value, <code>IN</code>.</p> </li> <li><a id="BABFDIBH" name="BABFDIBH"></a> <p>Leave Default Value empty.</p> </li> <li> <p>Add a second parameter by repeating steps <a href="#BABBECCF">7</a> through <a href="#BABFDIBH">11</a> with the Name <code>score</code> and the Type <code>NUMBER</code>.</p> </li> <li> <p>Add a third parameter by repeating steps <a href="#BABBECCF">7</a> through <a href="#BABFDIBH">11</a> with the Name <code>weight</code> and the Type <code>NUMBER</code>.</p> </li> <li> <p>Click <span class="bold">OK</span>.</p> <p>The <code>calculate_score</code> pane opens, showing the <code>CREATE</code> <code>FUNCTION</code> statement that created the function.</p> <p>Because the only statement in the execution part of the function is <code>RETURN</code> <code>NULL</code>, the function does nothing.</p> </li> <li> <p>Replace <code>NULL</code> with <code>score</code> <code>*</code> <code>weight</code>.</p> <p>The title of the <code>calculate_score</code> pane is in italic font, indicating that the function is not yet saved in the database.</p> </li> <li> <p>Select <span class="bold">Save</span> from the File menu.</p> <p>Oracle Database compiles the function and saves it. The title of the <code>calculate_score</code> pane is no longer in italic font.</p> </li> </ol> <div class="helpinfonotealso"> <h2>Related Topics</h2> <p><a href="tdddg_objects001.htm#CIHGAJDJ">About Data Definition Language (DDL) Statements</a></p> <p><a href="javascript:open('http://www.oracle.com/pls/db112/lookup?id=LNPLS01370','newWindow').focus()"><span class="italic">Oracle Database PL/SQL Language Reference</span></a></p> <p><a href="tdddg_subprograms005.htm#CIHCHIDB">Creating and Managing Standalone Stored Subprograms</a></p> </div> </div> <!-- class="sect2" --> <!-- Start Footer --> <div class="footer"> <table class="simple oac_no_warn" summary="" cellspacing="0" cellpadding="0" width="100%"> <col width="86%" /> <col width="*" /> <tr> <td align="left"><span class="copyrightlogo">Copyright © 1996, 2009, Oracle and/or its affiliates. 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