Re: Grouping Too Closely

From: "Thomas F(dot) O'Connell" <tfo(at)sitening(dot)com>
To: "Greg Sabino Mullane" <greg(at)turnstep(dot)com>
Cc: pgsql-sql(at)postgresql(dot)org
Subject: Re: Grouping Too Closely
Date: 2005-06-25 05:32:45
Message-ID: 62592AAD-20CB-42EC-B599-E1D42D16A7BC@sitening.com
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This doesn't give me quite what I'm looking for because I need there
to be only one of each possible value of seq2 to be returned for each
value of fkey.

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Thomas F. O'Connell
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Sitening, LLC

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On Jun 24, 2005, at 11:22 PM, Greg Sabino Mullane wrote:

>> What I'd like to be able to do is select all records corresponding to
>> the minimum value of seq1 for each value of seq2 corresponding to a
>> given fkey (with a lower bound on the value of seq2).
>
> I'm not sure how uid figures in, but would this do what you want?:
>
> SELECT fkey, uid, seq2, min(seq1)
> FROM my_table
> WHERE seq2 > 2
> GROUP BY fkey, uid, seq2
> ORDER BY 1,2,3;

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