Hello everyone and let me say thank you for the help. I'm developing
an inventory program using PHP and MySQL. So far I have the php
developed where you can enter a bar code, and type a quantity, and it
will log the serial and the quantity of that serial in the DB. What I
really want it to do is look to see if the bar code is already in the
database, and if so, then it simply adds the quantity that is being
input to the quantity value already in the DB. Presumably I also need
to subtract from the DB in a similar manner. Any ideas?
Thanks so much,
Brian