I have a table customer like a example, and 2 user making change in this. The firts user make select * from customer where a = 1 lock in share mode; and the second try to update the record where a = 1. In theory the second user can't make any change, but the update is true and change the data. Somebody know what happens or which is my error.... _________________________________________________________ Do You Yahoo!? Get your free @yahoo.com address at http://mail.yahoo.com --------------------------------------------------------------------- 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