SQL - 更新不起作用？

Question

當我運行此查詢;

UPDATE dbo.Account 
SET new_AccountTypeIdName = IIF(new_Existing = 1 , 'Existing','Potential') 
Where new_AccountTypeIdName = 'Member' 
AND new_Existing IN (0,1) 

它只是改變了什麼，是'new_AccountTypeIdName = '會員' 到 '存在'，不管'new_existing = 1或0。

任何人都可以指向正確的方向嗎？ IM使用SQL Server 2012

感謝

Answer 1

嘗試此查詢

UPDATE dbo.Account 
SET new_AccountTypeIdName = case when new_Existing = 1 then 'Existing' else 'Potential' end 
Where new_AccountTypeIdName = 'Member' 
AND new_Existing IN (0,1) 

Answer 2

拆分查詢到2個簡單：

UPDATE dbo.Account 
    SET new_AccountTypeIdName = 'Existing' 
    Where new_AccountTypeIdName = 'Member' AND new_Existing = 1 

UPDATE dbo.Account 
    SET new_AccountTypeIdName = 'Potential' 
    Where new_AccountTypeIdName = 'Member' AND new_Existing = 0