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2 column between optimization
Posted by: Brad Culberson ()
Date: September 02, 2005 12:39PM

I have the following table structure
column a int
column b int

I need to optimize queries similar to the following:
Select * from thattable where a > 1 and a < 2 and b > 3 and b < 5

After making an index including both a and b in ascending order, Explain shows it is not being used...

As a test, I also tried to add index just a and doing the following:
Select * from thattable where a > 1 and a < 2
Explain also shows it is also not being used.

Any ideas would be greatly appreciated.

Thanks,
Brad

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Subject Views Written By Posted
2 column between optimization 4792 Brad Culberson 09/02/2005 12:39PM
Re: 2 column between optimization 2253 Felix Geerinckx 09/02/2005 02:01PM
Re: 2 column between optimization 2287 Brad Culberson 09/02/2005 02:25PM
Re: 2 column between optimization 2132 Felix Geerinckx 09/02/2005 03:38PM
Re: 2 column between optimization 2072 Brad Culberson 09/06/2005 09:17PM
Re: 2 column between optimization 2129 Jay Pipes 09/05/2005 12:03PM
Re: 2 column between optimization 2062 Brad Culberson 09/06/2005 09:18PM
Re: 2 column between optimization 2072 KimSeong Loh 09/04/2005 07:21PM
Re: 2 column between optimization 2031 Brad Culberson 09/06/2005 09:14PM
Re: 2 column between optimization 2208 Jay Pipes 09/06/2005 09:22PM
Re: 2 column between optimization 1981 Brad Culberson 09/06/2005 11:17PM
Re: 2 column between optimization 1988 KimSeong Loh 09/07/2005 02:54AM
Re: 2 column between optimization 2299 Jay Pipes 09/07/2005 02:48AM
Re: 2 column between optimization 2147 Brad Culberson 09/07/2005 12:25PM
Re: 2 column between optimization 1984 Jay Pipes 09/07/2005 12:54PM


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