sql syntax INSERT

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 in advance, Robert Martin

sql syntax INSERT

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 in advance, Robert Martin