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* grouping by date
@ 2004-01-05 17:14 teknokrat <teknokrat@yahoo.com>
0 siblings, 1 reply; 2+ messages in thread
From: teknokrat @ 2004-01-05 17:14 UTC (permalink / raw)
To: pgsql-sql
How can I group by date given a timestamp column?
thanks
^ permalink raw reply [nested|flat] 2+ messages in thread
* Re: grouping by date
@ 2004-01-09 04:59 Robert Creager <Robert_Creager@LogicalChaos.org>
parent: teknokrat <teknokrat@yahoo.com>
0 siblings, 0 replies; 2+ messages in thread
From: Robert Creager @ 2004-01-09 04:59 UTC (permalink / raw)
To: teknokrat@yahoo.com; +Cc: pgsql-sql
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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