From: J.C.M. van der Kwast <jkwast@home.nl>
To: pgsql-sql@postgresql.org
Subject: Howto??
Date: Mon, 17 Mar 2003 14:34:41 +0100
Message-ID: <000801c2ec89$f70eeb60$04a779d9@cc299057a> (raw)
Hi,
After trying for a week now I've come to the conclusion that help is needed. I've got the following problem:
I have a table with id column, another id (id2) column and a value column. For each id there can be more id2. I want id2 for id where the value is min. I tried several things with having but it doesn't produce what I need. Example:
select id, id2, min(value) from table
group by id
having count (*) >1 and min(value) = (select min(value) from table)
Now it complains about id2 not being part of aggregate.
In order to get the min value I have to group by id, right? But because id2 is unique it won't do min on those values, right? So how do you tackle a problem like that? Any suggestions?
thanks sjors
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To: pgsql-sql@postgresql.org
Cc: jkwast@home.nl
Subject: Re: Howto??
In-Reply-To: <000801c2ec89$f70eeb60$04a779d9@cc299057a>
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