MYSQLで ReadOnly なユーザの作りかた

GRANT SELECT ON *.* TO readonly@"%" IDENTIFIED BY "";
GRANT SELECT ON *.* TO readonly@"localhost" IDENTIFIED BY "";
GRANT SELECT ON *.* TO readonly@"10.0.%.%" IDENTIFIED BY "";
GRANT SELECT ON *.* TO readonly@"192.168.%.%" IDENTIFIED BY "";
FLUSH PRIVILEGES;