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Message Posted: Tue, 10 Jan 2006 @ 15:45:32 GMT
Based on tests which I did recently, the OLAP Function performed better than using a normal aggregate function with a Group By clause. However this was based on a complex parent, child relationship and on a system with plenty of CPU headroom. The results showed a reduction of 30% in the elapsed time, but an increase in the amount of spool space required.
I would recommend that you perform tests on the type of query you need to perform.
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