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UPPER vs LOWER

user457357Apr 11 2007 — edited Apr 11 2007
I read on a website yesterday that when developing LOWER()should be used instead of UPPER() as lower has a performance gain over upper when used in sql syntax. Does anyone know if this is true and if so why. Thanks for the help.
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Locked on May 9 2007
Added on Apr 11 2007
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