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* How fetch multiple rows into one text-field?
@ 2009-07-31 20:09 Andreas <maps.on@gmx.net>
2009-07-31 23:29 ` Re: How fetch multiple rows into one text-field? Joshua Tolley <eggyknap@gmail.com>
0 siblings, 1 reply; 2+ messages in thread
From: Andreas @ 2009-07-31 20:09 UTC (permalink / raw)
To: pgsql-sql
Hi,
how can I fetch multiple rows into one text-field?
I need the contents of some log-infos condensed into a single text to
show in a report.
There is a log with a single record per event.
The log is like this (log_id, case_id, log_date, log_category, log_notes)
I need a date-ordered list of log-date, -category, -notes of all
log-events of the same case-id like
log_date || ' ' || log_category || ' : ' || log_nots
e.g.
20.07.2009 Category 17 : utterly noteworthy notes
21.07.2009 Category 42 : lots more
22.07.2009 Category 17 : still more drivel
The report consists of a couple of case-infos and should look like
case_id, case_name, case_all_log_events
Is there a way to do this?
regards
andreas
^ permalink raw reply [nested|flat] 2+ messages in thread
* Re: How fetch multiple rows into one text-field?
2009-07-31 20:09 How fetch multiple rows into one text-field? Andreas <maps.on@gmx.net>
@ 2009-07-31 23:29 ` Joshua Tolley <eggyknap@gmail.com>
0 siblings, 0 replies; 2+ messages in thread
From: Joshua Tolley @ 2009-07-31 23:29 UTC (permalink / raw)
To: Andreas <maps.on@gmx.net>; +Cc: pgsql-sql
On Fri, Jul 31, 2009 at 10:09:46PM +0200, Andreas wrote:
> Hi,
>
> how can I fetch multiple rows into one text-field?
> I need the contents of some log-infos condensed into a single text to
> show in a report.
It sounds like you might want something like this:
SELECT ... array_to_string(array_accum(log_notes, '<some delimiter>')) FROM...
You might need to add array_accum manually; before 8.4 it wasn't built in.
See http://www.postgresql.org/docs/8.3/static/xaggr.html
--
Joshua Tolley / eggyknap
End Point Corporation
http://www.endpoint.com
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