Using a Sum query in Oracle Forms

Question

Greedings,
I have the following query which works fine in PL/SQL but i cant get it working in Oracle forms as i get an error in SUM(SELECT...) . Any quidance on how i should fix my query to work in Forms?
select
   Sum((SELECT kl.amount
            FROM S03_a_salfldg@oracle_to_sun kl
            WHERE Trim(kl.accnt_code)=Trim(a.acnt_code)
            AND kl.period between 2008001 AND 2008012 AND ROWNUM=1)) AS actual
   from so_budgets_cat a,a01_acnt@oracle_to_sun b,so_budgets_com c,so_budgets d
   where trim(a.acnt_code)=trim(b.acnt_code)
   AND a.cat=c.cat
   AND TRIM(d.acnt_code)=trim(a.acnt_code)
   AND d.business_object=10000103883
   AND d.business_object=c.bus_object
   AND d.business_object=a.business_object
   AND SubStr(d.period,1,4)=Trim(c.PERIOD_Y)
   AND C.period_Y BETWEEN substr(2008001,1,4) AND substr(2008001,1,4)
   GROUP BY a.cat,a.acnt_code,c.com,a.cat_desc,b.descr,d.acnt_code
   order by a.cat,a.acnt_code,c.com,a.cat_desc,b.descrThanks in advance

Answer 1

And what error would that be? Also where are you using this query? In a from clause query? Also you didn't specify any version infos; as forms has it's own PL/SQL engine there is a possibility that you run in a version problem if the code runs fine in SQL*Plus but fails to compile in forms (e.g. when running Forms 6i against a 10g database). Without those informations answers to your question are based on guessings, and most likely will result in a question-answer ping-pong.
cheers