更新声明

Question

我有两个名为ASI和Call的表，表中的数据如下：

呼叫

ID   Flag  Created_ON
12   1     2011-08-05 11:48:09.477
15   1     2011-08-05 11:48:09.477
18   1     2011-08-05 11:48:09.477
20   1     2011-08-05 11:48:09.477
25   1     2010-08-12 14:05:11.000

ASI

ID  Open_Date
12  2010-07-02 09:40:00.000
20  2010-08-12 14:05:11.000
18  2010-08-09 15:26:43.000

我想将Call表中的Flag列更新为0，其中ASI表中不存在ID。在上面的例子中，我希望ID 15和25为0。

输出：

ID   Flag  Created_ON
12   1     2011-08-05 11:48:09.477
15   0     2011-08-05 11:48:09.477
18   1     2011-08-05 11:48:09.477
20   1     2011-08-05 11:48:09.477
25   0     2010-08-12 14:05:11.000

Answer 1

UPDATE A
SET A.Flag = 0
FROM Call A
LEFT JOIN ASI B
ON A.Id = B.Id
WHERE B.Id IS NULL

Answer 2

update call set flag=0 where id not in (
  select distinct id from asi)

Answer 3

UPDATE Call
SET Flag = 0
WHERE ID NOT IN (SELECT ID FROM ASI)