You'll either need to create your form from the database (i.e. rebuild) or buy or build a web service (we sell a great one) to get your data into a DB.
All your buttons are set to be submit buttons. As such, they all use whatever the Submit Options in your form are set to do. If you want them to each do something different, instead of being Submit buttons, have them use rules. Then in each rule you can submit to a different data connection.