Does database index need to be made for "ORDER BY" clause??

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August 4th, 2006, 04:14 PM

fletchsod

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Does database index need to be made for "ORDER BY" clause??

You know, I know that the database index need to be made for the "WHERE" clause start from left to right (B-Tree Index)..

I wonder if I need to create a database index for the "ORDER BY" clause? I just thought of that because we have to make indexes for the "WHERE" clause, you know... So, I was wondering if that mean we need to do one for the "ORDER BY" clause..

Thanks...

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