通过从另一个表中获取数据来更新mysql中的表？

Question

I am using mysql.i have 2 tables NOTE_ONE and NOTE_TWO. each table has three columns as ID and NAME and MID. i need to update NOTE_TWO table's MID column with data from MID column of NOTE_ONE. but condition is NOTE_ONE and NOTE_TWO tables NAME should be equal. PLease suggest me how to write query for this?

Thanks!

Answer 1

This should do the trick,

UPDATE NOTE_TWO n2, NOTE_ONE n1
SET n2.MID = n1.MID
WHERE n1.NAME = n2.NAME

Hope this helps

Answer 2

尝试这个

UPDATE note_two n2 set mid = (SELECT mid from note_one n1 where n1.name = n2.name)