mysql update/delete in 子查詢改寫


#子查詢(不支持)
update question q set q.`level`=2 where q.id in( select id from  question where id>=2111 limit 165,165);


#改寫
update question q inner join ( select id from  question where id>=2111 limit 165,165) t on q.id=t.id set q.`level`=2;


#子查詢(不支持)
delete from `user` where id in (
   select min(id) as id from `user` group by wx_open_id having count(1)>1
);

#改寫
delete from `user` where id in (
    select id from(    
       select min(id) as id from `user` group by wx_open_id having count(1)>1
    ) t
);

 


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