mysqlの下記のそれぞれの意味を調べる

mysql> show variables like 'character_set%';
+--------------------------+----------------------------+

Variable_name Value

+--------------------------+----------------------------+

character_set_client utf8
character_set_connection utf8
character_set_database utf8
character_set_filesystem binary
character_set_results utf8
character_set_server utf8
character_set_system utf8
character_sets_dir /usr/share/mysql/charsets/

+--------------------------+----------------------------+