在MySQL中，在where後面使用case when的說明

報錯語句

select * 
from A, B
where B.name in
CASE
    when A.id = 0 then ('aaa', 'bbb')
    when A.id = 1 then ('bbb', 'ccc')
    when A.id = 2 then ('ccc', 'ddd')
END

正確寫法：將B.name in 放到CASE END 中

select * 
from A, B
where 
CASE
    when A.id = 0 then B.name in
 
 ('aaa', 'bbb')
    when A.id = 1 then B.name in ('bbb', 'ccc')
    when A.id = 2 then B.name in ('ccc', 'ddd')
END

補充：當使用 B.name = 時，將不會出現以上問題，也就是如下寫法也正確

select * 
from A, B
where B.name = 
CASE
    when A.id = 0 then 'aaa'
    when A.id = 1 then 'bbb'
    when A.id = 2 then 'ccc'
END