If you've created your database, you can manage your database through pypmyadmin.
On cPanel you can access phpymyadmin. Here's the step by step :
- Login to cPanel? (You can login through your client area or with URL (http://domain.com/cpanel)
- On "Databases" menu click "phpmyadmin" sub-menu

- phpmyadmin page will open on new tab, and you can manage your MySQL Database on phpmyadmin now