Oracle到SQL Server查詢

Question

我通常使用Oracle，並且這樣的查詢將非常容易。我把我的腦子拿出來了。基本上它是獲得以前評論記錄的最大標識符。

在Oracle我會做一個更新這樣

UPDATE NOTES N1 
SET MASTER_RECORD_NUMBER = 
(SELECT MAX(MASTER_RECORD_NUMBER) 
FROM NOTES N2 
WHERE N1.CUSTOMER_NO = N2.CUSTOMER_NO 
AND N2.MASTER_RECORD_NUMBER < N1.MASTER_RECORD_NUMBER 
AND N2.CODE IS NOT NULL) 
WHERE N1.CODE IS NULL; 

基本上記錄號是連續的，而且代碼不存在，如果它是一個延續。查詢比這個稍長，涉及日期等，但這通常是我正在嘗試做的。

Answer 1

試試這個..

UPDATE N1 
SET MASTER_RECORD_NUMBER = 
(SELECT MAX(MASTER_RECORD_NUMBER) 
FROM NOTES N2 
WHERE N1.CUSTOMER_NO = N2.CUSTOMER_NO 
AND N2.MASTER_RECORD_NUMBER < N1.MASTER_RECORD_NUMBER 
AND N2.CODE IS NOT NULL) 
from notes n1 
WHERE N1.CODE IS NULL;