From: Michael Glaesemann <grzm@seespotcode.net>
To: Dave Crooke <dcrooke@gmail.com>
Cc: pgsql-performance <pgsql-performance@postgresql.org>
Subject: Re: Picking out the most recent row using a time stamp column
Date: Thu, 24 Feb 2011 15:21:49 -0500
Message-ID: <08B3368E-E623-4E9C-83F5-AB05B471AF4C@seespotcode.net> (raw)
In-Reply-To: <AANLkTinTgU-jfPOhrfteBvhAhgG_8zknpk13N9L4QMap@mail.gmail.com>
References: <AANLkTinTgU-jfPOhrfteBvhAhgG_8zknpk13N9L4QMap@mail.gmail.com>
On Feb 24, 2011, at 14:55, Dave Crooke wrote:
> Is there a more elegant way to write this, perhaps using PG-specific
> extensions?
SELECT DISTINCT ON (data.id_key)
data.id_key, data.time_stamp, data.value
FROM data
ORDER BY data.id_key, data.time_stamp DESC;
Michael Glaesemann
grzm seespotcode net
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To: pgsql-performance@postgresql.org
Cc: grzm@seespotcode.net, dcrooke@gmail.com
Subject: Re: Picking out the most recent row using a time stamp column
In-Reply-To: <08B3368E-E623-4E9C-83F5-AB05B471AF4C@seespotcode.net>
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