To use these instructions please access your cPanel account. If you aren't sure how to do this, use this Guide here
Where can I Edit my Database content?
Use the phpMyAdmin tool under the Databases area to gain access to your accounts MySQL admin tool
Within this tool you should be able to see all of your current Databases and their current tables and content.
You are provided with the option to Manually add your own Table clicking on New option
Or you can use SQL under the options bar, to add SQL code directly
To add content to a table manually, use the Insert option on the bar.
For further information on how to add Databases and edit them, you can click here