Re: Bringing other columns along with a GROUP BY clause

From: Gregory Stark <stark(at)enterprisedb(dot)com>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: "Rob Richardson" <Rob(dot)Richardson(at)rad-con(dot)com>, pgsql-general(at)postgresql(dot)org
Subject: Re: Bringing other columns along with a GROUP BY clause
Date: 2009-02-05 23:10:35
Message-ID: 87skmslbtg.fsf@oxford.xeocode.com
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Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> writes:

> I have a feeling that it could also be done via the "window functions"
> feature due to be introduced in 8.4, but I'm not entirely sure how.
> Anybody feeling handy with those?

There may be a better way but something like

select * from (select *, rank() over (partition by charge order by coldspot_time desc) as r) where r = 1

?

--
Gregory Stark
EnterpriseDB http://www.enterprisedb.com
Ask me about EnterpriseDB's 24x7 Postgres support!

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