ORACLE/SQL: wm_concat & order by

Question

I\'m using oracle 11 (not sure about the exact version, but since LISTAGG doesn\'t work, I suppose it\'s not release 2) through ODBC and crystal reports 2008.

Here

Answer 1

You can't reference ODB.TASK_CARD_CONTROL.CONTROL_CATEGORY from outside the inner query. Try:

SELECT TASK_CARD, WM_CONCAT(code) as ZONES
FROM (SELECT TASK_CARD, CODE, CONTROL_CATEGORY FROM ODB.TASK_CARD_CONTROL 
      WHERE ODB.TASK_CARD_CONTROL.CONTROL_CATEGORY = 'ZONE'
      ORDER BY CODE)
GROUP BY TASK_CARD