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I normally don't argue with Elvis about SQL performance but....
If most rows have a match, wouldn't COALESCE perform better?
On the other hand, if most rows don't have a match, I could see EXISTS
performing better as long as the right index exists.
Charles
On Fri, Apr 10, 2009 at 3:16 PM, Elvis Budimlic
<ebudimlic@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
BTW, for performance reasons, stick with the EXISTS and forget the COALESCE
in this case.
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