数据库表新增触发器

https://www.cnblogs.com/hoojo/archive/2011/07/20/2111316.html

以上是不错的数据库触发器博客，下面是我自己整理的一些，关于修改了表字段后，做一些判断的触发

USE [Test]

GO

/****** Object: Table [dbo].[TestTrigger] Script Date: 2018/2/7 下午 02:47:29 ******/
SET ANSI_NULLS ON
GO

SET QUOTED_IDENTIFIER ON
GO

CREATE TABLE [dbo].[TestTrigger](
[ID] [INT] IDENTITY(1,1) NOT NULL,
[TestInt] [INT] NULL,
[TestNvarchar] [NVARCHAR](50) NULL,
[TestDate] [DATETIME] NULL,
CONSTRAINT [PK_TestTrigger] PRIMARY KEY CLUSTERED
(
[ID] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]

GO

 

--创建insert插入类型触发器
if (object_id('tgr_TestTrigger_insert', 'tr') is not null)
drop trigger tgr_TestTrigger_insert
go
create trigger tgr_TestTrigger_insert
on TestTrigger
for insert --插入触发
as
--定义变量
declare @ID int, @TestInt int, @TestNvarchar NVARCHAR(50),@TestDate DATE;
--在inserted表中查询已经插入记录信息
select @ID = ID, @TestInt = TestInt,@TestNvarchar=TestNvarchar,@TestDate=TestDate from inserted;
IF(@TestNvarchar=N'b')
BEGIN
INSERT INTO [dbo].[TestTriggerStory](TestInt,TestNvarchar,TestDate) SELECT TestInt,TestNvarchar,TestDate FROM inserted;
END

go
--创建insert插入类型触发器
if (object_id('tgr_TestTrigger_update', 'tr') is not null)
drop trigger tgr_TestTrigger_update
go
create trigger tgr_TestTrigger_update
on TestTrigger
for update --插入触发
AS

--定义变量
declare @ID int, @TestInt int, @TestNvarchar NVARCHAR(50),@TestDate DATE,
@IDNew int, @TestIntNew int, @TestNvarcharNew NVARCHAR(50),@TestDateNew DATE;
--查看更新前的数据
select @ID = ID, @TestInt = TestInt,@TestNvarchar=TestNvarchar,@TestDate=TestDate FROM Deleted ;
--PRINT @TestNvarchar
IF(@TestNvarchar<>N'b')
BEGIN
PRINT '触发了1'
select @IDNew = ID, @TestIntNew = TestInt,@TestNvarcharNew=TestNvarchar,@TestDateNew=TestDate FROM inserted ;
IF(@TestNvarcharNew=N'b')
BEGIN
INSERT INTO [dbo].[TestTriggerStory](TestInt,TestNvarchar,TestDate) SELECT TestInt,TestNvarchar,TestDate FROM inserted;
PRINT '触发了2'
END
END
 

INSERT INTO dbo.TestTrigger
( TestInt, TestNvarchar, TestDate )
VALUES ( 0, -- TestInt - int
N'b', -- TestNvarchar - nvarchar(50)
GETDATE() -- TestDate - datetime
)

 

SELECT * FROM dbo.TestTrigger

UPDATE dbo.TestTrigger SET TestNvarchar=N'b' WHERE ID=1