63 lines
3.9 KiB
HTML
63 lines
3.9 KiB
HTML
<?xml version="1.0" encoding="UTF-8"?>
|
|
<!DOCTYPE html
|
|
PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
|
|
<html lang="en-us" xml:lang="en-us">
|
|
<head>
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
|
<meta name="security" content="public" />
|
|
<meta name="Robots" content="index,follow" />
|
|
<meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' />
|
|
<meta name="DC.Type" content="reference" />
|
|
<meta name="DC.Title" content="Step 5a: Update the current row" />
|
|
<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." />
|
|
<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." />
|
|
<meta name="DC.subject" content="cursor, update current row, example, examples, WHERE CURRENT OF clause, clause, WHERE CURRENT OF" />
|
|
<meta name="keywords" content="cursor, update current row, example, examples, WHERE CURRENT OF clause, clause, WHERE CURRENT OF" />
|
|
<meta name="DC.Relation" scheme="URI" content="rbafycursorexamp.htm" />
|
|
<meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" />
|
|
<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 1998, 2006" />
|
|
<meta name="DC.Format" content="XHTML" />
|
|
<meta name="DC.Identifier" content="rbafycurs5a" />
|
|
<meta name="DC.Language" content="en-us" />
|
|
<!-- All rights reserved. Licensed Materials Property of IBM -->
|
|
<!-- US Government Users Restricted Rights -->
|
|
<!-- Use, duplication or disclosure restricted by -->
|
|
<!-- GSA ADP Schedule Contract with IBM Corp. -->
|
|
<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
|
|
<link rel="stylesheet" type="text/css" href="./ic.css" />
|
|
<title>Step 5a: Update the current row</title>
|
|
</head>
|
|
<body id="rbafycurs5a"><a name="rbafycurs5a"><!-- --></a>
|
|
<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
|
|
<h1 class="topictitle1">Step 5a: Update the current row</h1>
|
|
<div><p>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.</p>
|
|
<div class="section"><p>The UPDATE ... WHERE CURRENT OF statement looks like this:</p>
|
|
<pre>EXEC SQL
|
|
<strong>UPDATE</strong> table-name
|
|
<strong>SET</strong> column-1 = value [, column-2 = value] ...
|
|
<strong>WHERE CURRENT OF</strong> cursor-name
|
|
END-EXEC.</pre>
|
|
</div>
|
|
<div class="section"><p>When used with a cursor, the UPDATE statement:</p>
|
|
<ul><li>Updates only one row—the current row</li>
|
|
<li>Identifies a cursor that points to the row to be updated</li>
|
|
<li>Requires that the columns updated be named previously in the FOR UPDATE
|
|
OF clause of the DECLARE CURSOR statement, if an ORDER BY clause was also
|
|
specified</li>
|
|
</ul>
|
|
</div>
|
|
<div class="section"><p>After you update a row, the cursor's position remains on that
|
|
row (that is, the current row of the cursor does not change) until you issue
|
|
a FETCH statement for the next row.</p>
|
|
</div>
|
|
</div>
|
|
<div>
|
|
<div class="familylinks">
|
|
<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>
|
|
</div>
|
|
</div>
|
|
</body>
|
|
</html> |