sql syntax INSERT

(Y <> myY) I know this won’t work, but I’m trying to avoid the overhead of running a query and checking the result before each INSERT. Would a “compound primary key” help? (To be honest I only have a slight idea of what one is.) Can one be created in MySQL? Thanks i

sql syntax INSERT

(Y <> myY) I know this won’t work, but I’m trying to avoid the overhead of running a query and checking the result before each INSERT. Would a “compound primary key” help? (To be honest I only have a slight idea of what one is.) Can one be created in MySQL? Thanks i