Database
From MythTV Official Wiki
MythTV database
MythTV uses a MySQL relational database to manage almost all aspects of configuration and day-to-day operation. Mythfrontend, mythbackend, mythfilldatabase, MythTV plugins and ancillary programs all interact with the database and use it to store settings and information.
By default, the database is named mythconverg and contains a set of tables that interact with one-another.
Note that when running multiple frontends and/or backends, only one database is required.
Command line interface
Use the mysql command on the host running the database:
% mysql -u mythtv -pmythtv mythconverg
SQL commands can be issued at the mysql> prompt.
Web Interface
Try installing phpMyAdmin.