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NOt EXISTS & NOT IN ??? [message #220163] Mon, 19 February 2007 05:06 Go to next message
yogeshse
Messages: 11
Registered: December 2005
Location: Chennai
Junior Member
Hi,
If I'm not wrong, I know it's better to use NOT EXISTS where it's possible instead of NOT IN clause. Can you give possible reasons supporting this ???

Thx,
Yogesh

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Re: NOt EXISTS & NOT IN ??? [message #220180 is a reply to message #220163] Mon, 19 February 2007 06:09 Go to previous message
michael_bialik
Messages: 621
Registered: July 2006
Senior Member
IMHO both methods are valid.
Sometimes EXISTS performs better, sometimes IN is preferred.

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