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OraclePoint >> Oracle Performance Tuning >> Scalar Subquery on cost of explain palnBookmark and Share 1782 Views,0 Replies


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Starter:  Topic: : Scalar Subquery on cost of explain paln
myDBA 
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Scalar Subquery on cost of explain paln



Is the statement "the cost of the parent should be equal or larger than the child" always true?
[url=http://www.oraclepoint.com]qT3qrsbaLOraclePoint0GGWpp30K[/url]


No,it's not strictly.
[url=http://www.oraclepoint.com]8QMW0JZEkOraclePointlEwCuG5ax[/url]

Please see a good posting about this with scalar subquery at attachment.

[url=http://www.oraclepoint.com]m3Ny2T5N9OraclePointjG9uDO7aO[/url]



Attachment: index.htm (Size:0.16kb, Download times:22)
2008-04-16 15:04
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OraclePoint >> Oracle Performance Tuning >> Scalar Subquery on cost of explain palnBookmark and Share 1782 Views,0 Replies



 


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