From: | bmccoy(at)chapelperilous(dot)net |
---|---|
To: | andrew(at)networkcomputerz(dot)com |
Cc: | pgsql-general(at)postgresql(dot)org |
Subject: | Re: distinct |
Date: | 2000-10-10 01:47:13 |
Message-ID: | Pine.LNX.4.10.10010092145010.4175-100000@chapelperilous.net |
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Thread: | |
Lists: | pgsql-general |
On Tue, 3 Oct 2000 andrew(at)networkcomputerz(dot)com wrote:
> I have attempted to run
> select distinct col1 from tablename;
> and it runs fine.
>
> When I run it in a real world environment: select distinct col1, col2,
> col3, col4 from tablename order by col1 desc, col2; It returns all the
> values from col1 which appears to be the same thing as not using
> distinct at all.
The DISTINCT constraint applies to all of the columns you are selecting,
not just the first one -- it selects all of the distinct TUPLES from the
query.
Brett W. McCoy
http://www.chapelperilous.net
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