From: Joseph Shraibman <jks@selectacast.net>
To: pgsql-sql <pgsql-sql@postgresql.org>
Subject: index question
Date: Thu, 18 Oct 2001 20:25:44 -0400
Message-ID: <3BCF7308.4060302@selectacast.net> (raw)
Lets say I have a table with columns a and b. I want to do a query like
SELECT count(distinct b) WHERE a = 2;
Should I have an index on a or an index on (a,b)?
--
Joseph Shraibman
jks@selectacast.net
Increase signal to noise ratio. http://www.targabot.com
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To: pgsql-sql@postgresql.org
Cc: jks@selectacast.net
Subject: Re: index question
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