From: | "J(dot)C(dot)M(dot) van der Kwast" <jkwast(at)home(dot)nl> |
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To: | <pgsql-sql(at)postgresql(dot)org> |
Subject: | Howto?? |
Date: | 2003-03-17 13:34:41 |
Message-ID: | 000801c2ec89$f70eeb60$04a779d9@cc299057a |
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Thread: | |
Lists: | pgsql-sql |
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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