In article <[EMAIL PROTECTED]>, Giuseppe Maxia <[EMAIL PROTECTED]> writes:
> The whole point is actually in subqueries, not when using IN or NOT IN in a > normal query. > The bug occurs when a NOT IN is used in a subquery as a LEFT JOIN replacement. > SELECT something from t1 where column1 NOT IN (SELECT nullable_column from > t2); That's not a bug. Let's say that the subquery returns 2, NULL, 3. Thus the NOT IN is a shorthand for column1 != 2 AND column1 != NULL AND column1 != 3 Since the second condition is never true, you get an empty result set. -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED]
