From: Robert Creager <Robert_Creager@LogicalChaos.org>
To: teknokrat@yahoo.com
Cc: pgsql-sql@postgresql.org
Subject: Re: grouping by date
Date: Thu, 8 Jan 2004 21:59:58 -0700
Message-ID: <20040108215958.791d131c.Robert_Creager@LogicalChaos.org> (raw)
In-Reply-To: <btc61h$2933$1@news.hub.org>
References: <btc61h$2933$1@news.hub.org>
When grilled further on (Mon, 05 Jan 2004 17:14:26 +0000),
teknokrat <teknokrat@yahoo.com> confessed:
> How can I group by date given a timestamp column?
>
I just found this out this weekend. Try 'date_trunc'. Look at secion 9.8.2 of
the documentation. I'm using something like:
SELECT date_trunc( 'hour', "when" ) AS "date" FROM readings GROUP BY "date";
Where "when" is my timestamp columnn.
Cheers,
Rob
--
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To: pgsql-sql@postgresql.org
Cc: Robert_Creager@LogicalChaos.org, teknokrat@yahoo.com
Subject: Re: grouping by date
In-Reply-To: <20040108215958.791d131c.Robert_Creager@LogicalChaos.org>
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