用户账号的crud

# create user account
CREATE USER 'username'@'host' IDENTIFIED BY 'password';# delete user account
DROP USER 'username'@'host';# alter
ALTER USER 'username'@'host' IDENTIFIED BY 'new_password';# select
select user, host from mysql.user;

用户权限的crud

# create# read 
SHOW GRANTS FOR 'username'@'host';# update
GRANT PRIVILEGE_TYPE ON database_name.table_name TO 'username'@'host';## add all privilege
GRANT SELECT on testdb.* TO 'user1'@'localhost';
GRANT ALL PRIVILEGES ON *.* TO 'user1'@'localhost';# delete
REVOKE privilege_type ON database_name.table_name FROM 'username'@'host';REVOKE SELECT ON testdb.* FROM 'user1'@'localhost';
REVOKE ALL PRIVILEGES ON *.* FROM 'user1'@'localhost';