Robert Martin wrote: > Hi, > > I?m still learning sql so I hope this doesn?t sound to basic. > > I would like to find out if there is a way to insert a record only when (X and Y) do >not exist. > I have the value to check against stored in a variable.
ALTER TABLE table ADD UNIQUE u_xy_idx ( x, y ); Then when you go to insert a duplicate x,y you will get an error from MySQL. --Bill --------------------------------------------------------------------- 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
