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Re: UNION Query is slow
Posted by: Rick James
Date: January 31, 2009 01:48AM

Do you have INDEX (cif, date) ?

I have one UI that regularly creates a UNION of 50 selects; it runs tolerably fast.

How many rows in the result set? Does it have LIMIT on the end? If so, how many rows _before_ the LIMIT is applied?

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Written By
January 30, 2009 11:08AM
Re: UNION Query is slow
January 31, 2009 01:48AM

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