Login to your cPanel
Click on “MySQL Databases” in the section “Databases”
Current user list is appearing in the “Current User” table at the bottom of the page
Under the column “Delete” click on the X next to the user you want to delete
Delete MySQL database:
After you create a new MySQL database, it will start appearing in “Current Databases” table
Reach the “Actions” column and click the link “Delete Database” to delete the particular database