2021年12月8日
left join 去除重复
摘要： select * from ecs_admin_user as u left join (select * from ecs_admin_user_xundian group by user_id) as x using(user_id) where user_id=571 select * FRO 阅读全文
posted @ 2021-12-08 10:44 Microtiger 阅读(1576) 评论(0) 推荐(0)