Using % for host when creating a MySQL user

Question

My MySQL database needs two users: appuser and support.
One of the application developers insists that I create four accounts for these users:

appuser@\'         


        

Answer 1

As @nos pointed out in the comments of the currently accepted answer to this question, the accepted answer is incorrect.

Yes, there IS a difference between using % and localhost for the user account host when connecting via a socket connect instead of a standard TCP/IP connect.

A host value of % does not include localhost for sockets and thus must be specified if you want to connect using that method.