81 lines
5.4 KiB
HTML
81 lines
5.4 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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<meta name="DC.Title" content="Insert rows into a table using a select-statement" />
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<meta name="abstract" content="You can use a select-statement within an INSERT statement to insert zero, one, or more rows into a table from the result table of the select-statement." />
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<title>Insert rows into a table using a select-statement</title>
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</head>
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<body id="rbafymultrow"><a name="rbafymultrow"><!-- --></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">Insert rows into a table using a select-statement</h1>
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<div><p>You can use a select-statement within an INSERT statement to insert
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zero, one, or more rows into a table from the result table of the select-statement. </p>
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<div class="section"><p>One use for this kind of INSERT statement is to move data into
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a table you created for summary data. For example, suppose you want a table
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that shows each employee's time commitments to projects. Create a table called
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EMPTIME with the columns <em>EMPNUMBER</em>, <em>PROJNUMBER</em>, <em>STARTDATE</em>,
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and <em>ENDDATE</em> and then use the following INSERT statement to fill the
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table: </p>
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<pre> <strong>INSERT INTO</strong> CORPDATA.EMPTIME
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(EMPNUMBER, PROJNUMBER, STARTDATE, ENDDATE)
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<strong>SELECT</strong> EMPNO, PROJNO, EMSTDATE, EMENDATE
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<strong>FROM</strong> CORPDATA.EMPPROJACT</pre>
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</div>
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<div class="section"><p>The select-statement embedded in the INSERT statement
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is no different from the select-statement you use to retrieve data. With the
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exception of FOR READ ONLY, FOR UPDATE, or the OPTIMIZE clause, you can use
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all the keywords, functions, and techniques used to retrieve data. SQL inserts
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all the rows that meet the search conditions into the table you specify. Inserting
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rows from one table into another table does not affect any existing rows in
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either the source table or the target table.</p>
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</div>
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<div class="section"><p>You should consider the following when inserting multiple rows
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into a table: </p>
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</div>
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<div class="section"> <div class="note"><span class="notetitle">Notes:</span> <ol><li>The number of columns implicitly or explicitly listed in the INSERT statement
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must equal the number of columns listed in the select-statement.</li>
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<li>The data in the columns you are selecting must be compatible with the
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columns you are inserting into when using the INSERT with select-statement.</li>
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<li>In the event the select-statement embedded in the INSERT returns no rows,
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an SQLCODE of 100 is returned to alert you that no rows were inserted. If
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you successfully insert rows, the SQLERRD(3) field of the SQLCA has an integer
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representing the number of rows SQL actually inserted. This value is also
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available from the ROW_COUNT diagnostics item in the GET DIAGNOSTICS statement.</li>
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<li>If SQL finds an error while running the INSERT statement, SQL stops the
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operation. If you specify COMMIT (*CHG), COMMIT(*CS), COMMIT (*ALL), or COMMIT(*RR),
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nothing is inserted into the table and a negative SQLCODE is returned. If
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you specify COMMIT(*NONE), any rows inserted before the error remain in the
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table.</li>
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</ol>
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</div>
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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="rbafyinsert.htm" title="This topic shows the basic SQL statements and clauses that insert data into tables and views. Examples using these SQL statements are supplied to help you develop SQL applications.">Insert rows using the INSERT statement</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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