Matthias Nagl <pg(at)mnagl(dot)de> writes:
> For a table like this I am looking for a query that returns a result that
> looks this way:
>
> name
> -------------
> abc, def, ghi
You need something like this:
create function concat_agg_accum(varchar, varchar) returns varchar
as 'select $1 || '', '' || $2'
language sql
strict immutable;
create aggregate concat_agg (
basetype = varchar,
stype = varchar,
sfunc = concat_agg_accum
);
select concat_agg(name) as name, ...
--
greg