Sorting columns dynamically using Presentation Variables

Question

Hi,
I have 4 measures say A,B,C,D , a period dimension and branch name dimension. I would like to select the measure in the prompt and the result should display rank for the selected measure using presentation variables. For eg: If measure-A is selected, the result should be arranged in order by based on "A".
Is it possible to sort the columns dynamically?
Kindly help me.
Regards,
RB

Answer 1

Hi RB,
You can do that, though it's a bit more complicated than a simple SQL statement. For example:
WITH BASEDATA AS (
SELECT
  EMPNO,
  ENAME,
  MGR,
  SAL,
  COMM,
  CASE WHEN :P4_SORT_ORDER = 1 THEN
    ROW_NUMBER() OVER (ORDER BY UPPER(ENAME))
  WHEN :P4_SORT_ORDER = 2 THEN
    ROW_NUMBER() OVER (ORDER BY (SELECT NVL(MIN(UPPER(E2.ENAME)),'-Select-') FROM EMP E2 WHERE E2.EMPNO = EMP.MGR))
  WHEN :P4_SORT_ORDER = 3 THEN
    ROW_NUMBER() OVER (ORDER BY (SELECT NVL(MIN(UPPER(E2.ENAME)),'-Select-') FROM EMP E2 WHERE E2.EMPNO = EMP.MGR), UPPER(ENAME))
  WHEN :P4_SORT_ORDER = 4 THEN
    ROW_NUMBER() OVER (ORDER BY UPPER(ENAME) DESC)
  WHEN :P4_SORT_ORDER = 5 THEN
    ROW_NUMBER() OVER (ORDER BY (SELECT NVL(MIN(UPPER(E2.ENAME)),'-Select-') FROM EMP E2 WHERE E2.EMPNO = EMP.MGR) DESC)
  WHEN :P4_SORT_ORDER = 6 THEN
    ROW_NUMBER() OVER (ORDER BY (SELECT NVL(MIN(UPPER(E2.ENAME)),'-Select-') FROM EMP E2 WHERE E2.EMPNO = EMP.MGR) DESC, UPPER(ENAME) DESC)
  END SORTITEM,
  'O' STATUS
FROM
  EMP
SELECT
  EMPNO, 
  ENAME,
  MGR,
  SAL,
  COMM
FROM
  BASEDATA
ORDER BY
  SORTITEMUsing a CASE statement this assigns a ROW_NUMBER to every record based on its ordering within the selected ORDER BY clause. The output is then sorted by this value.
Andy