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Thread: Question about clustering multiple columns

Question about clustering multiple columns

From
"Benjamin Arai"
Date:
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?
 
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Re: Question about clustering multiple columns

From
Bruno Wolff III
Date:
On Tue, Jun 13, 2006 at 09:04:15 -0700,
  Benjamin Arai <benjamin@araisoft.com> 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.