character_set_client: The sql statement issued on the client side becomes this character code
character_set_connection: converts characters received from the client into this character code
character_set_database: character code of the DB currently being referenced
character_set_results: The search result sent to the client is this character code
character_set_server: Default character code when creating DB
character_set_system: utf8 is always used in the character set used by the system
character-set-filesystem: file system character code
