mysql 将select查询的值赋给update set语句中

表tenant_oper结构：

create table `tenant_oper` (  `id` int(11) not null auto_increment,   `oper_name` varchar(255) not null,  `oper_code` varchar(255) not null,  `remark` varchar(512) default "",  `menu_id` int default 0,  primary key (`id`)) engine=InnoDB default charset=utf8;

表tenant_menu结构：

create table `tenant_menu` (  `id` int(11) not null auto_increment,   `menu_code` varchar(255) not null,  `menu_name` varchar(255) not null,  `menu_position` smallint not null,  `menu_url` varchar(255) default "",  `parent_id` int default 0,  primary key (`id`)) engine=InnoDB default charset=utf8;

sql语句：

update tenant_oper set oper_code = '5_4_1_1', menu_id = (select id from tenant_menu where menu_code = '5_4_1') where oper_code = '5_4_1';