-- The mysql server package will install the mysql database server which you can interact with using a mysql client. You can use the mysql client to send commands to any mysql server; on a remote computer or your own.
-- The mysql server is used to persist the data and provide a query interface for it (SQL). The mysql clients purpose is to allow you to use that query interface.
-- The client package also comes with utilities that allows you to easily backup/restore data and administer the server.