Simple answer my friend, if you have a shell account, you could just log in and change stuff, but since you have a content management system (please, please tell me its not cPanel), then all you need to do is install in your webspace a web-based frontend for mysql.
Try the awesome
phpMyAdmin , free and open source. You only need to change some connection parameters in one of the scripts (dont recall which one, just read the installation instructions), and thats it, upload it through ftp or whatever you have at hand, and get ready to administer your DB easily, from the web
cheers