Re: "select c1, method(c2) group by c1" returns all values of c2 for c1

Hello

you can use a string%agg function if you have a 9.0. On older version
there is a array_agg function

select c1, array_to_string(array_agg(c2),',') from T1 group by c1

regards

Pavel Stehule

2011/2/8 Emi Lu <emilu(at)encs(dot)concordia(dot)ca>:
> Good afternoon,
>
> Is there a method to retrieve the following results:
>
> T1(c1 int, c2 varchar(128) )
> ---------------------------------
>
>
> (1, val1);
> (1, val2);
> (1, val3);
> (2, val1);
> (3, val5);
> (3, val6);
>
> select c1, method(c2)
> group by c1
>
> returns:
> ============
> 1,   "val1, val2, val3"
> 2,   "val1"
> 3,   "val5, val6"
>
>
> Thanks a lot!
>
> --
> Lu Ying
>
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