mysql update 报错

[meduke]

UPDATE pass_activity SET overall_sort = (10 - STATUS) * 100000000 + instance_number + (SELECT
	n.num FROM (SELECT  ( CASE WHEN vip_rank = 1 AND vip_expdate > NOW() THEN 100
		WHEN vip_rank = 2 AND vip_expdate > NOW() THEN 200
		WHEN vip_rank = 3 AND vip_expdate > NOW() THEN 300 ELSE 0 END) 
	+ (CASE WHEN ue.identity_verified IS NOT NULL THEN 50 ELSE 0 END) 
	AS num
	FROM accuvally_user u JOIN accuvally_user_extends ue ON u.account = ue.account WHERE u.account = pass_activity.create_by) AS n)
WHERE id IN( 5395653487500, 4394645338900,7393945083100,1343275124100)

pass_activity表的overall_sort 栏位 需要根据accuvally_user表（vip_rank vip_expdate 2个栏位 ）和accuvally_user_extends 表（identity_verified 一个栏位）通过 用户id进行关联。算出对应的排序值。我这种写法有问题，报错：
1 queries executed, 0 success, 1 errors, 0 warnings

查询：UPDATE pass_activity SET overall_sort = (10 - status) * 100000000 + instance_number + (SELECT n.num FROM (SELECT ( CASE WHEN vip...

错误代码： 1054
Unknown column 'pass_activity.id' in 'where clause'

请问怎么改？

[meduke]

UPDATE pass_activity a JOIN (SELECT pa.id,  ( CASE WHEN vip_rank = 1 AND vip_expdate > NOW() THEN 100
		WHEN vip_rank = 2 AND vip_expdate > NOW() THEN 200
		WHEN vip_rank = 3 AND vip_expdate > NOW() THEN 300 ELSE 0 END) 
	+ (CASE WHEN ue.identity_verified IS NOT NULL THEN 50 ELSE 0 END) 
	AS num
	FROM accuvally_user u JOIN accuvally_user_extends ue ON u.account = ue.account JOIN pass_activity pa ON u.account = pa.create_by) AS n
	ON a.id = n.id
	SET overall_sort = (10 - STATUS) * 100000000 + instance_number + n.num
	WHERE a.id IN( 5395653487500, 4394645338900,7393945083100,1343275124100)

刚刚我自己写的，应该是可以的。还有没有其他方式？

[二月十六]

UPDATE  pass_activity
SET     overall_sort = ( 10 - STATUS ) * 100000000 + instance_number
        + ( SELECT  ( CASE WHEN vip_rank = 1
                                AND vip_expdate > NOW() THEN 100
                           WHEN vip_rank = 2
                                AND vip_expdate > NOW() THEN 200
                           WHEN vip_rank = 3
                                AND vip_expdate > NOW() THEN 300
                           ELSE 0
                      END )
                    + ( CASE WHEN ue.identity_verified IS NOT NULL THEN 50
                             ELSE 0
                        END ) AS num
            FROM    accuvally_user u
                    JOIN accuvally_user_extends ue ON u.account = ue.account
            WHERE   u.account = pass_activity.create_by
          )
WHERE   id IN ( 5395653487500, 4394645338900, 7393945083100, 1343275124100 );

[ACMAIN_CHM]

没什么其它方式， MYSQL中的UPDATE只支持 update a inner join b on ... set ...