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Re: Faster non-existence check (newbie)

From: Stephane Rouleau <Stephane.Rouleau_at_alcatel.fr>
Date: Tue, 07 Dec 1999 14:13:20 +0000
Message-ID: <384D1600.4F6D040@alcatel.fr> 





Try this one certainly more efficient :



SELECT COUNT(*) FROM parent WHERE


NOT EXISTS (SELECT 1 FROM child WHERE child.ident = parent.ident)


Received on Tue Dec 07 1999 - 08:13:20 CST












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