SQL代码更新表

Question

我有两个表：

Master Table  Assets Table 
-AssetNo-   -AssetNo- 

AssetNo是PK，这是一个外键两个表链接。现在，我想用更新：

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

如果我用这个命令，所有资产与同assetno将自动更新为1

如何具体assetNo IE代码：WHERE 111(from Assets)=111(from Master)

Answer 1

如果我正确理解你的问题，我想你只需要另外一个条件在WHERE子句：

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

Answer 2

你使用的是什么sql引擎？像这样的东西会为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