170 lines
8.3 KiB
HTML
170 lines
8.3 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 http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 2005" />
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<meta name="DC.rights.owner" content="(C) Copyright IBM Corporation 2005" />
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<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))' />
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<meta name="DC.Type" content="task" />
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<meta name="DC.Title" content="Change information in a table" />
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<meta name="DC.Relation" scheme="URI" content="rzatcgetstartsql.htm" />
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<meta name="DC.Relation" scheme="URI" content="../sqlp/rbafykickoff.htm" />
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<meta name="DC.Format" content="XHTML" />
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<meta name="DC.Identifier" content="rzatcchgtblsql" />
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<meta name="DC.Language" content="en-us" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- US Government Users Restricted Rights -->
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<!-- Use, duplication or disclosure restricted by -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>Change information in a table</title>
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</head>
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<body id="rzatcchgtblsql"><a name="rzatcchgtblsql"><!-- --></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">Change information in a table</h1>
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<div><div class="section">You can use the SQL UPDATE statement to change the data values in
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some or all of the columns of a table. <p>If you want to limit the number
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of rows being changed during a single statement execution, use the WHERE clause
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with the UPDATE statement. If you do not specify the WHERE clause, all of
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the rows in the specified table are changed. However, if you use the WHERE
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clause, the system changes only the rows satisfying the conditions that you
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specify.</p>
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<p>Suppose you want to use interactive SQL and are placing an
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order for more paper clips today.</p>
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</div>
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<ol><li class="stepexpand"><span>To update the LAST_ORDER_DATE and ORDER_QUANTITY for item number
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303476, type <tt>UPDATE</tt> and press F4 (Prompt). The Specify UPDATE Statement
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display is shown.</span> <div class="p"><pre class="screen"> Specify UPDATE Statement
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Type choices, press Enter.
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Table . . . . . . . . <strong>INVENTORY_LIST</strong>______ Name, F4 for list
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Collection . . . . . <strong>SAMPLECOLL</strong>__ Name, F4 for list
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Correlation . . . . . ____________________ Name
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F3=Exit F4=Prompt F5=Refresh F12=Cancel F20=Display full names
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F21=Display statement</pre>
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</div>
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</li>
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<li class="stepexpand"><span><img src="./delta.gif" alt="Start of change" />Enter the table name and schema name, as shown
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in the previous panel. <img src="./deltaend.gif" alt="End of change" /></span></li>
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<li class="stepexpand"><span>Press Enter. The display is shown again with the list of columns
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in the table.</span> <div class="p"><pre class="screen"> Specify UPDATE Statement
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Type choices, press Enter.
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Table . . . . . . . . INVENTORY_LIST______ Name, F4 for list
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Collection . . . . . SAMPLECOLL__ Name, F4 for list
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Correlation . . . . . ____________________ Name
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Type information, press Enter.
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Column Value
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ITEM_NUMBER _____________________________________________________
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ITEM_NAME _____________________________________________________
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UNIT_COST _____________________________________________________
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QUANTITY_ON_HAND _____________________________________________________
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LAST_ORDER_DATE <strong>CURRENT DATE</strong>_________________________________________
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ORDER_QUANTITY <strong>50</strong>___________________________________________________
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Bottom
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F3=Exit F4=Prompt F5=Refresh F6=Insert line F10=Copy line
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F11=Display type F12=Cancel F14=Delete line F24=More keys</pre>
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</div>
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</li>
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<li class="stepexpand"><span>Specify <kbd class="userinput">CURRENT DATE</kbd> in the <span class="uicontrol">LAST_ORDER_DATE</span> field
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to change the value to today's date.</span></li>
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<li class="stepexpand"><span>Enter the updated values as shown.</span></li>
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<li class="stepexpand"><span>Press Enter to see the display on which the WHERE condition can
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be specified. If a WHERE condition is not specified, all the rows in the table
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are updated using the values from the previous display.</span> <div class="p"><pre class="screen"> Specify UPDATE Statement
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Type WHERE conditions, press Enter. Press F4 for a list.
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<strong> ITEM_NUMBER = '303476'</strong>________________________________________________
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______________________________________________________________________
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Bottom
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Type choices, press Enter.
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WITH isolation level . . . 1 1=Current level, 2=NC (NONE)
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3=UR (CHG), 4=CS, 5=RS (ALL)
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6=RR
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F3=Exit F4=Prompt F5=Refresh F6=Insert line F9=Specify subquery
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F10=Copy line F12=Cancel F14=Delete line F15=Split line F24=More keys</pre>
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</div>
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</li>
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<li class="stepexpand"><span>Enter <kbd class="userinput">ITEM_NUMBER =’303476’</kbd> in the WHERE
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condition field. </span></li>
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<li class="stepexpand"><span>Press Enter to perform the update on the table. A message indicates
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that the function is complete.</span></li>
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</ol>
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<div class="section">Running a SELECT statement to get all the rows from the table (SELECT
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* FROM SAMPLECOLL.INVENTORY_LIST), returns the following result:<div class="p"><pre class="screen"> Display Data
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Data width . . . . . . : 71
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Position to line . . . . . Shift to column . . . . . .
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....+....1....+....2....+....3....+....4....+....5....+....6....+....7.
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ITEM ITEM UNIT QUANTITY LAST NUMBER
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NUMBER NAME COST ON ORDER ORDERED
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HAND DATE
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153047 Pencils, red 10.00 25 - 20
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229740 Lined tablets 1.50 120 - 20
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544931 ***UNKNOWN*** 5.00 - - 20
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303476 Paper clips 2.00 100 05/30/94 50
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559343 Envelopes, legal 3.00 500 - 20
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291124 Envelopes, standard .00 - - 20
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775298 Chairs, secretary 225.00 6 - 20
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073956 Pens, black 20.00 25 - 20
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******** End of data ********
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Bottom
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F3=Exit F12=Cancel F19=Left F20=Right F21=Split</pre>
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</div>
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<p>Only
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the entry for <em>Paper clips</em> was changed. The LAST_ORDER_DATE was changed
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to be the current date. This date is always the date the update is run. The
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NUMBER_ORDERED shows its updated value.</p>
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</div>
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<div class="section">This statement can be typed on the Enter SQL Statements display as:<pre><strong>UPDATE</strong> SAMPLECOLL.INVENTORY_LIST
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<strong>SET</strong> LAST_ORDER_DATE = CURRENT DATE,
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ORDER_QUANTITY = 50
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<strong>WHERE</strong> ITEM_NUMBER = ’303476’</pre>
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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="rzatcgetstartsql.htm" title="This topic describes how to create and work with schemas, tables, and views using SQL statements in interactive SQL.">Get started with SQL</a></div>
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</div>
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<div class="relinfo"><strong>Related information</strong><br />
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<div><a href="../sqlp/rbafykickoff.htm">SQL Programming</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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