Re: Question about clustering multiple columns

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От
Bruno Wolff III
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Re: Question about clustering multiple columns
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20060616153132.GA9056@wolff.to
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Question about clustering multiple columns "Benjamin Arai" <benjamin@araisoft.com>
Re: Question about clustering multiple columns Bruno Wolff III <bruno@wolff.to>
On Tue, Jun 13, 2006 at 09:04:15 -0700,
  Benjamin Arai  wrote:
> Hi,
>  
> I have a database where there are three columns (name,date,data).  The
> queries are almost always something like SELECT date,data FROM table WHERE
> name=blah AND date > 1/1/2005 AND date < 1/1/2006;.  I currently have three
> B-tree indexes, one for each of the columns.  Is clustering on date index
> going to be what I want, or do I need a index that contains both name and
> date?

I would expect that clustering on the name would be better for the above
query.
You probably want an index on name and date combined.
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