Hi. This query can find the record in Table1 that not found in Table2
SELECT Table1.ID FROM Table1 LEFT JOIN Table2 Using(ID) WHERE Table2.ID IS NULL and what query that use to delete the record in Table1 that not found in Table2 such as Delete from Table1 where Table1.ID in SELECT Table1.ID FROM Table1 LEFT JOIN Table2 Using(ID) WHERE Table2.ID IS NULL because of MySQL ver 3.23.XX not support sub select while we still use 3.23.XX and one more question How to merge table with varchar type not char type (because if table contain varchar column we can't merge them but with table that only have char column it work) Kittiphum Woracht,MT. --------------------------------------------------------------------- Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail <[EMAIL PROTECTED]> To unsubscribe, e-mail <[EMAIL PROTECTED]> Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
