In cPanel, I think only root has power to create untagged databases / usernames, though you can have a go at the following:
host in most cases is just localhost. user and password depends on what you have created through cpanel.
In SSH try:
mysql -u user.name -p create database.name
I just tried creating untagged database in phpmyadmin and it returns a permission denied error.
If you are restoring a large sql backup through phpmyadmin you will find there is a 2M limit, (it can be changed in php.ini). To get around this you just upload the SQL file to your root folder and then run this in SSH:
mysql -u user.name -p database.name < backup.sql