Tsql 在删除触发器中更新多行已删除的表

我从SQLServer2000中的以下触发器开始

 ALTER TRIGGER DeleteTrigger
 ON [dbo].[WarrantyClaimsLineItems]
 FOR DELETE
 AS 
 begin

    declare @wa int
    SET @wa = (SELECT warrantyAuthNo from DELETED)
    update dbo.warrantyclaimsauth
    set isused = 0
    WHERE warrantyClaimsAuth.warrantyauthno = @wa


end

基本上，每当从表中删除一个行项目时，我都需要将分配给该行项目的warrantyauth.isUsed更新回false

它在删除一个行项目时起作用，但在删除多个行项目时，我会出现以下错误

Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , >, >= or when the subquery is used as an expression.

但是，这将在isUsed字段中用0更新保修期内的每一行。 谁能帮我解决我做错了什么？

---

谢谢大家!

您的加入条件在第二个条件中是错误的。试试这个：

 AFTER DELETE
 AS 
 begin

    update a set isUsed = 0
    from dbo.warrantyclaimsauth a
    inner join deleted d on a.warrantyAuthNo = d.warrantyAuthNo


 end

您加入了

deleted

，其中

warrantyauthno

等于自身，而不是

deleted

表中的值。实际上，您只是执行了一个

交叉连接
的
deleted
，而没有过滤任何行

inner join deleted d on a.warrantyAuthNo = a.warrantyAuthNo

应该是

inner join deleted d on a.warrantyAuthNo = d.warrantyAuthNo

你现在有一个简单的连接条件，给出了一个交叉连接，它不会过滤到
删除的
哦，天哪，我真是个笨蛋，我疯了，一直忽略了这一点。谢谢，很抱歉这个愚蠢的问题！
....
 AFTER DELETE
 AS 
 begin

    update dbo.warrantyclaimsauth set isUsed = 0
    from dbo.warrantyclaimsauth a
    inner join deleted d on a.warrantyAuthNo = d.warrantyAuthNo


 end

....
 AFTER DELETE
 AS 
 begin

    update dbo.warrantyclaimsauth set isUsed = 0
    from dbo.warrantyclaimsauth a
    inner join deleted d on a.warrantyAuthNo = d.warrantyAuthNo


 end