Yes. Every account with Above Media comes with at least one MySQL database.
To manage your database(s), login to your control panel at http://cp.abovemedia.com, click on "phpMyAdmin".
For more information on phpMyAdmin, please visit http://www.phpmyadmin.net/home_page/docs.php
For more information on SQL Queries, please visit http://www.w3schools.com/sql/default.asp