Elizabeth O'Neill's Office Mail wrote:
> I have two tables in my database a complaint table and a resolution table.
> One complaint may have several resolutions. I am trying to build a report
> that will give me the complaint details and all the resolution descriptions
> for a complaint in one text area/row (concated together).
>
> At the moment it is repeating the complaint details for each resolution.
As someone else mentioned I think, you can use a plpgsql function. Here is a
contrived example:
create table complaint(cid int, descr text);
insert into complaint values(1,'my #1 complaint');
insert into complaint values(2,'my #2 complaint');
create table resolution(rid int, cid int, res text);
insert into resolution values (1,1,'fixed it');
insert into resolution values (2,1,'really fixed it!');
insert into resolution values (3,2,'pbkbac again');
create or replace function my_concat(int) returns text as'
declare ret text; comp text; rec record; cntr int = 0;
begin select into comp descr from complaint where cid = $1; ret := ''Comp = '' || comp; for rec in select res from
resolutionwhere cid = $1 loop cntr := cntr + 1; ret := ret || '': Res# '' || cntr::text || '' = '' || rec.res;
endloop; return ret;
end;
' language 'plpgsql';
regression=# select my_concat(cid) from complaint; my_concat
---------------------------------------------------------------------- Comp = my #1 complaint: Res# 1 = fixed it: Res#
2= really fixed it! Comp = my #2 complaint: Res# 1 = pbkbac again
(2 rows)
In the past I think I remember someone trying to solve this kind of problem
with a custom aggregate, but the plpgsql approach is probably simpler.
HTH,
Joe
