我无法对视图执行删除操作.在各个表上一切正常.
I am unable to perform a delete on a View. Everything worked fine on the individual tables.
添加触发器
CREATE TRIGGER myTrigger ON [ViewName] INSTEAD OF DELETE AS DELETE FROM [ViewName] WHERE [ColumnName] < DATEADD(Day, -90, GETDATE())在添加触发器之前我收到以下错误
I got the following error before adding a trigger
View or Function "blah" is not updateable because the modification affects multiple base tables> 推荐答案好的,让我们想象一个会发生此错误的实例(因为您还没有显示您的视图定义).
Okay, let's imagine one instance where this error will occur (since you haven't shown your view definition).
假设我们有一个视图:
CREATE VIEW dbo.V1 with schemabinding as select 'T1' as TabName,T1ID as ID,ImportantDate from dbo.T1 union all select 'T2',T2ID,ImportantDate from dbo.T2我们现在尝试:
DELETE from dbo.V1 where ImportantDate < DATEADD(day,-90,CURRENT_TIMESTAMP)我们会收到您显示的错误(或类似错误).所以我们需要的是一个触发器:
we'll get the error you've shown (or similar). So what we need is a trigger:
CREATE TRIGGER T_V1_D on dbo.V1 instead of delete as set nocount on delete from dbo.T1 where T1ID in (select ID from deleted where TabName = 'T1') delete from dbo.T2 where T2ID in (select ID from deleted where TabName = 'T2')如果没有简单的方法将 deleted 伪表中的行与需要从每个基表中删除的行相关联,则编写此触发器会变得相当复杂.
This trigger gets considerably more complex to write if there's no easy way to correlate rows from the deleted psuedo-table with which rows need to be deleted from each base table.
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无法在 View SQL Server 2005 上执行删除
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