Using In operator in Formula Column,URGENT!!!!!!!!!

Question

Hi...
I want to ask if I have a formula Column(REPORTS 6i),and I want in where condition using parameter to some condition as this example:
function CF_1Formula return Number is
S NUMBER(10);
begin
SELECT SUM(SAL) INTO S FROM EMP
WHERE DEPTNO IN (:DEPT);
RETURN(S);
end;
Where :DEPT is user parameter of char Datatype and it is value 10,20 and may be 10,30,40
and so on.
on runtime the sql will be:
SELECT SUM(SAL) INTO S FROM EMP
WHERE DEPTNO IN (10,20);
but this not work.So what is the correct way to deal with this sql stat.,
and :dept always have different values.
So PLS any ONE help me ASAP

Answer 1

Something like this will work (10g onwards)
SQL> ed
Wrote file afiedt.buf
  1  with req as (select '&required_empnos' as empno from dual)
  2  --
  3  select *
  4  from emp
  5  where empno in
  6    (select regexp_substr(empno, '[^,]+', 1, rownum)
  7     from req
  8*    connect by rownum <= length(regexp_replace(empno, '[^,]'))+1)
SQL> /
Enter value for required_empnos: 7839,7499,7934
old   1: with req as (select '&required_empnos' as empno from dual)
new   1: with req as (select '7839,7499,7934' as empno from dual)
     EMPNO ENAME      JOB              MGR HIREDATE         SAL       COMM     DEPTNO
      7839 KING       PRESIDENT            17-NOV-81       5000                    10
      7934 MILLER     CLERK           7782 23-JAN-82       1300                    10
      7499 ALLEN      SALESMAN        7698 20-FEB-81       1600        300         30
SQL>