SQL代码更新表

Question

我有两张桌子：

Master Table       Assets Table
-AssetNo-           -AssetNo-

AssetNo是PK，它是链接两个表的外键。现在，我想使用以下内容进行更新：

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

如果我使用此命令，则具有相同assetno的所有资产将自动更新为1。

如何使用特定的assetNo IE进行编码：WHERE 111(from Assets)=111(from Master)

Answer 1

如果我理解你的问题，我认为你的WHERE子句中只需要另一个条件：

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？像这样的东西适用于sql server：

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