From: Bruno Wolff III <bruno@wolff.to>
To: Michael Sterling <stermic@gw.co.jackson.mo.us>
Cc: pgsql-sql@postgresql.org
Subject: Re: max timestamp
Date: Sun, 15 Feb 2004 13:51:52 -0600
Message-ID: <20040215195152.GA570@wolff.to> (raw)
In-Reply-To: <f7359f44.0402101014.77198f7b@posting.google.com>
References: <f7359f44.0402101014.77198f7b@posting.google.com>
On Tue, Feb 10, 2004 at 10:14:04 -0800,
Michael Sterling <stermic@gw.co.jackson.mo.us> wrote:
> i'm trying to get the max time stamp, from each day, of a range of
> dates, not just the max time stamp for the complete range dates but
> for each day.
SELECT DISTINCT ON can probably do what you want. Something like:
SELECT DISTINCT ON (timestamp::DATE) * FROM table ORDER BY timestamp DESC;
This won't produce any records for days where there are no timestamps.
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To: pgsql-sql@postgresql.org
Cc: bruno@wolff.to, stermic@gw.co.jackson.mo.us
Subject: Re: max timestamp
In-Reply-To: <20040215195152.GA570@wolff.to>
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