我遇到此触发器的问题。我希望它能够更新所要求的信息 只对有问题的行（我刚更新的那一行）而不是整个表格。
CREATE TRIGGER [dbo].[after_update]
ON [dbo].[MYTABLE]
AFTER UPDATE
AS
BEGIN
UPDATE MYTABLE
SET mytable.CHANGED_ON = GETDATE(),
CHANGED_BY=USER_NAME(USER_ID())
如何告诉触发器这仅适用于相关行？
答案 0 :(得分：16)
以下是测试后的示例
CREATE TRIGGER [dbo].UpdateTasadoresName
ON [dbo].Tasadores
FOR UPDATE
AS
UPDATE Tasadores
SET NombreCompleto = RTRIM( Tasadores.Nombre + ' ' + isnull(Tasadores.ApellidoPaterno,'') + ' ' + isnull(Tasadores.ApellidoMaterno,'') )
FROM Tasadores
INNER JOIN INSERTED i ON Tasadores.id = i.id
插入的特殊表将包含更新记录中的信息。
答案 1 :(得分：6)
试试这个（更新，而不是更新后）
CREATE TRIGGER [dbo].[xxx_update] ON [dbo].[MYTABLE]
FOR UPDATE
AS
BEGIN
UPDATE MYTABLE
SET mytable.CHANGED_ON = GETDATE()
,CHANGED_BY = USER_NAME(USER_ID())
FROM inserted
WHERE MYTABLE.ID = inserted.ID
END
答案 2 :(得分：3)
这样做很简单， 首先创建您希望保留日志的表的副本 例如，您有表dbo.SalesOrder，其列包含SalesOrderId，FirstName，LastName，LastModified
你的版本archieve表应该是dbo.SalesOrderVersionArchieve，列SalesOrderVersionArhieveId，SalesOrderId，FirstName，LastName，LastModified
以下是在SalesOrder表
上设置触发器的方法USE [YOURDB]
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
-- =============================================
-- Author: Karan Dhanu
-- Create date: <Create Date,,>
-- Description: <Description,,>
-- =============================================
CREATE TRIGGER dbo.[CreateVersionArchiveRow]
ON dbo.[SalesOrder]
AFTER Update
AS
BEGIN
SET NOCOUNT ON;
INSERT INTO dbo.SalesOrderVersionArchive
SELECT *
FROM deleted;
END
现在，如果您在saleOrder表中进行任何更改，它将显示VersionArchieve表中的更改
答案 3 :(得分：2)
尝试这个解决方案。
DECLARE @Id INT
DECLARE @field VARCHAR(50)
SELECT @Id= INSERTED.CustomerId
FROM INSERTED
IF UPDATE(Name)
BEGIN
SET @field = 'Updated Name'
END
IF UPDATE(Country)
BEGIN
SET @field = 'Updated Country'
END
INSERT INTO CustomerLogs
VALUES(@Id, @field)
// OR
-- If you wish to update existing table records.
UPDATE YOUR_TABLE SET [FIELD]=[VALUE] WHERE {CONDITION}
我没有用旧版本的sql server检查这个，但这适用于sql server 2012。
答案 4 :(得分：1)
您应该能够访问INSERTED表并检索ID或表的主键。类似于这个例子......
CREATE TRIGGER [dbo].[after_update] ON [dbo].[MYTABLE]
AFTER UPDATE AS
BEGIN
DECLARE @id AS INT
SELECT @id = [IdColumnName]
FROM INSERTED
UPDATE MYTABLE
SET mytable.CHANGED_ON = GETDATE(),
CHANGED_BY=USER_NAME(USER_ID())
WHERE [IdColumnName] = @id
以下是使用触发器时INSERTED和DELETED表格中MSDN上的链接：http://msdn.microsoft.com/en-au/library/ms191300.aspx
答案 5 :(得分：0)
首先，您已经看到的触发器将更新表中的每条记录。没有进行过滤来完成jus行的更改。
其次，您假设批次中只有一行发生变化，因为多行可能会发生变化。
正确执行此操作的方法是使用虚拟插入和删除的表：http://msdn.microsoft.com/en-us/library/ms191300.aspx
答案 6 :(得分：0)
尝试使用此脚本创建一个临时表TESTTEST，并观察优先级顺序，因为按以下顺序调用触发器：1）INSTEAD OF，2）FOR，3）之后
所有逻辑都放在INSTEAD OF触发器中，我有两个示例，说明如何编写某些方案...
祝你好运...
CREATE TABLE TESTTEST
(
ID INT,
Modified0 DATETIME,
Modified1 DATETIME
)
GO
CREATE TRIGGER [dbo].[tr_TESTTEST_0] ON [dbo].TESTTEST
INSTEAD OF INSERT,UPDATE,DELETE
AS
BEGIN
SELECT 'INSTEAD OF'
SELECT 'TT0.0'
SELECT * FROM TESTTEST
SELECT *, 'I' Mode
INTO #work
FROM INSERTED
UPDATE #work SET Mode='U' WHERE ID IN (SELECT ID FROM DELETED)
INSERT INTO #work (ID, Modified0, Modified1, Mode)
SELECT ID, Modified0, Modified1, 'D'
FROM DELETED WHERE ID NOT IN (SELECT ID FROM INSERTED)
--Check Security or any other logic to add and remove from #work before processing
DELETE FROM #work WHERE ID=9 -- because you don't want anyone to edit this id?!?!
DELETE FROM #work WHERE Mode='D' -- because you don't want anyone to delete any records
SELECT 'EV'
SELECT * FROM #work
IF(EXISTS(SELECT TOP 1 * FROM #work WHERE Mode='I'))
BEGIN
SELECT 'I0.0'
INSERT INTO dbo.TESTTEST (ID, Modified0, Modified1)
SELECT ID, Modified0, Modified1
FROM #work
WHERE Mode='I'
SELECT 'Cool stuff would happen here if you had FOR INSERT or AFTER INSERT triggers.'
SELECT 'I0.1'
END
IF(EXISTS(SELECT TOP 1 * FROM #work WHERE Mode='D'))
BEGIN
SELECT 'D0.0'
DELETE FROM TESTTEST WHERE ID IN (SELECT ID FROM #work WHERE Mode='D')
SELECT 'Cool stuff would happen here if you had FOR DELETE or AFTER DELETE triggers.'
SELECT 'D0.1'
END
IF(EXISTS(SELECT TOP 1 * FROM #work WHERE Mode='U'))
BEGIN
SELECT 'U0.0'
UPDATE t SET t.Modified0=e.Modified0, t.Modified1=e.Modified1
FROM dbo.TESTTEST t
INNER JOIN #work e ON e.ID = t.ID
WHERE e.Mode='U'
SELECT 'U0.1'
END
DROP TABLE #work
SELECT 'TT0.1'
SELECT * FROM TESTTEST
END
GO
CREATE TRIGGER [dbo].[tr_TESTTEST_1] ON [dbo].TESTTEST
FOR UPDATE
AS
BEGIN
SELECT 'FOR UPDATE'
SELECT 'TT1.0'
SELECT * FROM TESTTEST
SELECT 'I1'
SELECT * FROM INSERTED
SELECT 'D1'
SELECT * FROM DELETED
SELECT 'TT1.1'
SELECT * FROM TESTTEST
END
GO
CREATE TRIGGER [dbo].[tr_TESTTEST_2] ON [dbo].TESTTEST
AFTER UPDATE
AS
BEGIN
SELECT 'AFTER UPDATE'
SELECT 'TT2.0'
SELECT * FROM TESTTEST
SELECT 'I2'
SELECT * FROM INSERTED
SELECT 'D2'
SELECT * FROM DELETED
SELECT 'TT2.1'
SELECT * FROM TESTTEST
END
GO
SELECT 'Start'
INSERT INTO TESTTEST (ID, Modified0) VALUES (9, GETDATE())-- not going to insert
SELECT 'RESTART'
INSERT INTO TESTTEST (ID, Modified0) VALUES (10, GETDATE())--going to insert
SELECT 'RESTART'
UPDATE TESTTEST SET Modified1=GETDATE() WHERE ID=10-- gointo to update
SELECT 'RESTART'
DELETE FROM TESTTEST WHERE ID=10-- not going to DELETE
SELECT 'FINISHED'
SELECT * FROM TESTTEST
DROP TABLE TESTTEST
答案 7 :(得分：0)
您可以调用PendingOrders，SQL Server使用这些表捕获事件发生前后的已修改行的数据。我假设您的表中键的名称为Route
我认为以下代码可以为您提供帮助
function App() {
return (
<BrowserRouter>
<div className="App">
<Header/>
<Route path="/project/:name" component={Project}/>
<Route path="/about" component={About}/>
<CartHolder/>
</div>
</BrowserRouter>
);
}
答案 8 :(得分：-3)
CREATE TRIGGER [dbo].[after_update] ON [dbo].[MYTABLE]
AFTER UPDATE
AS
BEGIN
DECLARE @ID INT
SELECT @ID = D.ID
FROM inserted D
UPDATE MYTABLE
SET mytable.CHANGED_ON = GETDATE()
,CHANGED_BY = USER_NAME(USER_ID())
WHERE ID = @ID
END