Stephen Frost <sfrost(at)snowman(dot)net> writes:
> This doesn't seem right to me:
> postgres=# select
> postgres-# string_agg(column1::text order by column1 asc,',')
> postgres-# from (values (3),(4),(1),(2)) a;
> string_agg
> ------------
> 1234
> (1 row)
Looks fine to me: you have two ordering columns (the second rather
useless, but that's no matter).
regards, tom lane