Create a new hostname for an existing database

How can I do?
I need to link a new hostname for existing database, created a host name, but I do not see where the hostname to connect to the database.

help me please

If you have added a hostname to the mySQL databases page in the panel you are done. They simply point to the server and not a specific database, any listed may be used interchangeably.

then I could have only one hostname for all databases, right?
thanks for the help.

Yes, as LakeRat mentioned hostnames are interchangeable. You can use any of your hostnames to access any of your databases.