Hi all, I think I found a bug using the IN operator.
I have a table t populated as follow: a | b ---+---- 1 | 11 2 | 22 3 | 33 4 | NULL (4 rows) select * from t where b in (11,22,NULL); a | b ---+---- 1 | 11 2 | 22 (2 rows) select * from t where b not in (11,22,NULL); a | b ---+---- (0 rows) ----------------------------------------------- I tried the same quesry in mysql and it give me a different result. Who are right? select * from t where b not in (11,22,NULL); +---+---+ | a | b | +---+---+ | 3 | 33| +---+---+ 1 row in set (0.00 sec) please reply to [EMAIL PROTECTED] jose ---------------------------(end of broadcast)--------------------------- TIP 6: Have you searched our list archives? http://archives.postgresql.org