On 9/7/07, Chansup Byun <Chansup.Byun@xxxxxxx> wrote: > Can someone show me an example SQL statement? I suppose you could add a constant, non-overlapping number to add to the duplicate IDs, say 1000, and then this: SELECT COALESCE(T1.U_USER, T2.U_USER) AS U_USER , COALESCE(CASE WHEN EXISTS(SELECT 1 FROM TABLEB WHERE U_ID = T1.U_ID AND U_USER <> T1.U_USER) THEN T1.U_ID + 1000 ELSE T1.U_ID END , T2.U_ID ) AS U_ID FROM TABLEA T1 FULL JOIN TABLEB T2 ON T1.U_USER = T2.U_USER will generate a new list of U_USERs and U_IDs. Good luck. ---------------------------(end of broadcast)--------------------------- TIP 9: In versions below 8.0, the planner will ignore your desire to choose an index scan if your joining column's datatypes do not match