Of course, excuse me.
I would like to validate the gift card number that the user fills in, in the form (BokningPresentkortnrID). This should be validated against the "BokningPresentkortnrID" column from the "Bokning" table. If it does not match any of the gift card numbers in the table, then it will be error message.
The form is written to the "Bokning" table today. I would also like the value in the field "BokningAntal" to be added (++) to the column "ProvningPlatserBokade" in the table "Provning". Hope this help!