That's exactly what I needed. Thanks very much!
-Whit
On Fri, Oct 9, 2009 at 12:29 PM, Raymond O'Donnell <rod@iol.ie> wrote:
> On 09/10/2009 17:17, Whit Armstrong wrote:
>> Is there any easy way to get this data:
>>
>> kls_dev=# select * from ary_values;
>> agent_name | myval
>> ------------+-------
>> a | 1
>> a | 2
>> a | 3
>> b | 4
>> b | 5
>> b | 6
>> (6 rows)
>>
>> to look like this:
>>
>> kls_dev=# select * from ary_test;
>> agent_name | vals
>> ------------+---------
>> a | {1,2,3}
>> b | {4,5,6}
>> (2 rows)
>
> Someone (Alvaro?) once posted a really handy aggregate which ought to do
> what you want:
>
> CREATE AGGREGATE array_accum(anyelement) (
> SFUNC=array_append,
> STYPE=anyarray,
> INITCOND='{}'
> );
>
> And then you'd call it like so:
>
> select agent_name, array_accum(myval) from ary_values
> group by agent_name;
>
>
> I hope that helps.
>
> Ray.
>
>
>
> ------------------------------------------------------------------
> Raymond O'Donnell, Director of Music, Galway Cathedral, Ireland
> rod@iol.ie
> Galway Cathedral Recitals: http://www.galwaycathedral.org/recitals
> ------------------------------------------------------------------
>
