mysql从另一个表更新一个表

Question

I try the code below it notwork I guest maybe where clause not orect

 update member set member.`status` = 4
     where member.idmember = select DISTINCT activitynote.idmemberref where activitynote.checkkey =4

then I try

update member, activitynote set member.`status` = 4
 where member.idmember = activitynote.idmemberref
and activitynote.checkkey = 4

This code is work but not the thing I want please help

member.idmember is primary key and activitynote.idmemberref can be duplicate

Answer 1

If I understood correctly, then it should solve the problem.

update member set member.`status` = 4
where member.idmember IN 
(select DISTINCT activitynote.idmemberref from activitynote where activitynote.checkkey =4)