First go out and get a computer science degree. You may learn how but you may also learn that you should not poking around someone else’s database. If it is a database at all, you would have to find out which one it is (SQL, Oracle, PostgreSQL, etc).
Then you would need to know which program is accessing the database. Then one would perform some injection.
I only tell you this much because you are young and probably would not be able to do it. What I learned is hacking is not knowing how to hack, it is knowing when not to overstep your boundaries