使用if语句进行Mysql更新

Question

在MySQL中

Table1 columns Id, Foo, Bar, Choc, Blk, AB

Table2 columns ID, A, B, C 

我试图用

的结果更新表1 col AB

IF( (C / ((A + B)/ 2))>1, "A...", "B..." ) from Table2 

Where T1.id =t2.id

Answer 1

UPDATE table1
JOIN Table2 on Table1.id = Table2.id
SET AB = CASE WHEN C / ((A + B)/ 2) > 1 THEN "A..." ELSE "B..." END