| From: | "A(dot) Kretschmer" <andreas(dot)kretschmer(at)schollglas(dot)com> |
|---|---|
| To: | pgsql-general(at)postgresql(dot)org |
| Subject: | Re: how to several records with same timestamp into one line? |
| Date: | 2008-11-12 11:24:39 |
| Message-ID: | 20081112112439.GG13765@a-kretschmer.de |
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| Lists: | pgsql-general |
am Wed, dem 12.11.2008, um 18:57:42 +0800 mailte zxo102 ouyang folgendes:
> Hi everyone,
> My data with same timestamp "2008-11-12 12:12:12" in postgresql are as
> follows
>
> rowid data unit channel create_on
> ------------------------------------------------------------------------------
> 1 1.5 MPa channel1 2008-11-12 12:12:12
> 2 2.5 M3 channel2 2008-11-12 12:12:12
> 3 3.5 M3 channel3 2008-11-12 12:12:12
> 4 4.5 t channel4 2008-11-12 12:12:12
> ------------------------------------------------------------------------------
>
> I would like to "group" them into one line with SQL like
>
> 1.5 MPa 2.5 M3 3.5 M3 4.5 t 2008-11-12 12:12:12
Maybe you can create a new aggregate, for instance like there:
http://www.zigo.dhs.org/postgresql/#comma_aggregate
Regards, Andreas
--
Andreas Kretschmer
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