63 lines
3.9 KiB
HTML
63 lines
3.9 KiB
HTML
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE 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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<html lang="en-us" xml:lang="en-us">
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<head>
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<meta name="DC.Type" content="reference" />
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<meta name="DC.Title" content="Step 5a: Update the current row" />
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<meta name="abstract" content="When your program has positioned the cursor on a row, you can update its data by using the UPDATE statement with the WHERE CURRENT OF clause. The WHERE CURRENT OF clause specifies a cursor that points to the row you want to update." />
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<meta name="description" content="When your program has positioned the cursor on a row, you can update its data by using the UPDATE statement with the WHERE CURRENT OF clause. The WHERE CURRENT OF clause specifies a cursor that points to the row you want to update." />
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<meta name="DC.subject" content="cursor, update current row, example, examples, WHERE CURRENT OF clause, clause, WHERE CURRENT OF" />
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<meta name="keywords" content="cursor, update current row, example, examples, WHERE CURRENT OF clause, clause, WHERE CURRENT OF" />
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<meta name="DC.Relation" scheme="URI" content="rbafycursorexamp.htm" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 1998, 2006" />
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<title>Step 5a: Update the current row</title>
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</head>
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<body id="rbafycurs5a"><a name="rbafycurs5a"><!-- --></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">Step 5a: Update the current row</h1>
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<div><p>When your program has positioned the cursor on a row, you can update
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its data by using the UPDATE statement with the WHERE CURRENT OF clause. The
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WHERE CURRENT OF clause specifies a cursor that points to the row you want
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to update.</p>
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<div class="section"><p>The UPDATE ... WHERE CURRENT OF statement looks like this:</p>
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<pre>EXEC SQL
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<strong>UPDATE</strong> table-name
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<strong>SET</strong> column-1 = value [, column-2 = value] ...
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<strong>WHERE CURRENT OF</strong> cursor-name
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END-EXEC.</pre>
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</div>
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<div class="section"><p>When used with a cursor, the UPDATE statement:</p>
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<ul><li>Updates only one row—the current row</li>
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<li>Identifies a cursor that points to the row to be updated</li>
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<li>Requires that the columns updated be named previously in the FOR UPDATE
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OF clause of the DECLARE CURSOR statement, if an ORDER BY clause was also
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specified</li>
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</ul>
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</div>
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<div class="section"><p>After you update a row, the cursor's position remains on that
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row (that is, the current row of the cursor does not change) until you issue
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a FETCH statement for the next row.</p>
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</div>
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</div>
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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="rbafycursorexamp.htm" title="Suppose your program examines data about people in department D11. The following examples show the SQL statements you would include in a program to define and use a serial and a scrollable cursor.">Examples: Use a cursor</a></div>
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</div>
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</div>
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</body>
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</html>
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