72 lines
3.6 KiB
HTML
72 lines
3.6 KiB
HTML
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<meta name="DC.Title" content="Examples of PARTITION with DB2 Multisystem" />
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<meta name="abstract" content="Here gives an example about how to use the PARTITION function." />
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<meta name="description" content="Here gives an example about how to use the PARTITION function." />
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<title>Examples of PARTITION with DB2 Multisystem</title>
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</head>
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<body id="partex"><a name="partex"><!-- --></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">Examples of PARTITION with DB2<sup>®</sup> Multisystem</h1>
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<div><p>Here gives an example about how to use the PARTITION function.</p>
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<div class="section"> <ul><li>Find the PARTITION number for every row of the EMPLOYEE table. <div class="p">SQL
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statement: <pre>SELECT PARTITION(CORPDATA.EMPLOYEE), LASTNAME
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FROM CORPDATA.EMPLOYEE</pre>
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</div>
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<div class="p">OPNQRYF command: <pre>OPNQRYF FILE((CORPDATA/EMPLOYEE))
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FORMAT(FNAME)
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MAPFLD((PART1 '%PARTITION(1)'))</pre>
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</div>
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</li>
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<li>Select the employee number (EMPNO) from the EMPLOYEE table for all rows
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where the partition number is equal to 100. <div class="p">SQL statement: <pre>SELECT EMPNO
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FROM CORPDATA.EMPLOYEE
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WHERE PARTITION(CORPDATA.EMPLOYEE) = 100</pre>
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</div>
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<div class="p">OPNQRYF command:
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<pre>OPNQRYF FILE((EMPLOYEE)) QRYSLT('%PARTITION(1) *EQ 100')</pre>
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</div>
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</li>
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<li>Join the EMPLOYEE and DEPARTMENT tables, select all rows of the result
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where the rows of the two tables have the same partition number. <div class="p">SQL statement:
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<pre>SELECT *
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FROM CORPDATA.EMPLOYEE X, CORPDATA.DEPARTMENT Y
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WHERE PARTITION(X)=PARTITION(Y)</pre>
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</div>
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<div class="p">OPNQRYF command: <pre>OPNQRYF FILE((CORPDATA/EMPLOYEE) (CORPDATA/DEPARTMENT))
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FORMAT(FNAME)
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JFLD((1/PART1 2/PART2 *EQ))
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MAPFLD((PART1 '%PARTITION(1)')
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(PART2 '%PARTITION(2)'))</pre>
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</div>
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</li>
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</ul>
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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="scalarpart.htm" title="Through the PARTITION function, you can determine the partition number where a specific row of the distributed relational database is stored.">PARTITION with DB2 Multisystem</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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