SQL代碼更新表

Question

我有兩個表：

Master Table  Assets Table 
-AssetNo-   -AssetNo- 

AssetNo是PK，這是一個外鍵兩個錶鏈接。現在，我想用更新：

UPDATE Assets 
    SET status = 1 
    FROM Assets, Master 
WHERE Assets.AssetNo = Master.AssetNo 

如果我用這個命令，所有資產與同assetno將自動更新爲1

如何具體assetNo IE代碼：WHERE 111(from Assets)=111(from Master)

Answer 1

如果我正確理解你的問題，我想你只需要另外一個條件在WHERE子句：

UPDATE Assets 
    SET status = 1 
    FROM Assets, Master 
WHERE Assets.AssetNo = Master.AssetNo 
    AND Assets.AssetNo = 111 

Answer 2

你使用的是什麼sql引擎？像這樣的東西會爲SQL Server的工作：

Update a 
SET Status = 1 
FROM Assets a 
JOIN Master m on a.AssetNo = m.AssetNo 
WHERE a.AssetNo = 111 

Answer 3

UPDATE Assets SET status = 1 
FROM Assets a JOIN Master m ON a.AssetNo = m.AssetNo 
WHERE a.AssetNo = 999 

Answer 4

UPDATE a 
SET a.Status = 1 
FROM Assets AS a 
INNER JOIN Master AS m ON a.AssetNo = m.AssetNo 
WHERE m.AssetNo = @value