Database question

Hi All

What it is im currently starting to make my database for users to register to my game so everyone has there own save and profile for a game im making but before i go any further can someone please explain how i would make my game so it can add to and update the database. Can the load data from file read an sql file and modify it. Ino you can use post and get but how would i test it works before i put it onto a server.

As you can probably tell im new to databases

also the code used for making games is c# isnt it, how do i get my games code up and can i create text boxs for my game by hard coding them in?

Any help on this would be much appreciated, oh btw im using microsoft access to make the database