| From: | btober(at)ct(dot)metrocast(dot)net |
|---|---|
| To: | Anthony Masinton <amasinton(at)gmail(dot)com>, pgsql-general(at)postgresql(dot)org |
| Subject: | Re: Combining data in different rows? |
| Date: | 2007-01-02 20:53:32 |
| Message-ID: | 459AC64C.9040509@ct.metrocast.net |
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| Lists: | pgsql-general |
Bruno Wolff III wrote:
> On Tue, Jan 02, 2007 at 12:33:14 -0700,
> Anthony Masinton <amasinton(at)gmail(dot)com> wrote:
>
>> I would like to combine data from different rows in one column into
>> one row.
>>
>> ...
>>
>> Is this possible and if so, how?
>>
>
> Collapsing rows is done with aggregate functions. You can write a custom
> aggregate that collapses the wills for a particular city. How you do this
> depends on how you want to store the combined wills (e.g. array, text string).
>
Check out the User Comments section at
"http://www.postgresql.org/docs/8.0/interactive/sql-createaggregate.html"
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