In relational algebra, queries using the expression "for all" are usually handled with the division operation. What is the equivalent of the division operation in mysql (in sql, it's "where not exists B except A")?
--------------------------------------------------------------------- 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
