SQL服務器 - 更新數據從另一個表

Question

我的問題是：

我有2個表分配和服務 我想更新來自像其他表的列的數據一列。

UPDATE [Services] 
SET 
     TeamID = (SELECT [AssignedTeam] 
         FROM [Assignment] 
         WHERE [ServiceName] in ([Services].[ServiceName])) 
WHERE 
    EXISTS (
     SELECT [ServiceName] 
     FROM [Assignment]) 

它不起作用。有人可以幫我解決這種情況嗎？ Thx

Answer 1

使用JOIN更新。

查詢

UPDATE t1 
SET t1.[TeamID] = t2.[AssignedTeam] 
FROM [Services] t1 
JOIN [Assignment] t2 
ON t1.[ServiceName] = t2.[ServiceName]; 

Answer 2

UPDATE [Services] SET TeamID = [AssignedTeam] FROM [Assignment] WHERE [Assignment].[ServiceName] = [Services].[ServiceName]