text: CREATE TABLE `sys_user_role` (
    `user_id` int(11) unsigned NOT NULL DEFAULT '0' COMMENT '用户ID',
    `role_id` int(11) unsigned NOT NULL DEFAULT '0' COMMENT '角色ID',
    PRIMARY KEY (`user_id`, `role_id`)
  ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='用户角色关联表';
  