将当前数据库的表role_modules 的select权限赋予给用户uwangq：

GRANT SELECT ON role_modules TO uwangq@'%' IDENTIFIED BY "uwangq";
FLUSH PRIVILEGES;

将当前数据库的表role_modules 的select权限从用户uwangq上撤销：

REVOKE SELECT ON role_modules FROM uwangq@'%' IDENTIFIED BY "uwangq";
FLUSH PRIVILEGES;