收集Insert/Update/Delete操作所引起的数据变化
如果一个程式在运行，你没有source code，看不到相关的SQL语句或与DB交互的命令，有没有办法追踪数据的来龙去脉呢？下面介绍一个简单的方法来收集Insert/Update/Delete操作所引起的数据变化，以便你熟悉程式运行的每一步所引起的数据变化。下面以表PERSON为例：
建PERSON表：
USE [TESTDB] GO /****** Object: Table [dbo].[PERSON] Script Date: 2012/10/11 14:11:58 ******/ SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER ON GO SET ANSI_PADDING ON GO CREATE TABLE [dbo].[PERSON]( [ID] [int] NULL, [NAME] [varchar](50) NULL ) ON [PRIMARY] GO SET ANSI_PADDING OFF GO
建表PERSON_LOG，用于存放PERSON数据变化前后的数据：
USE [TESTDB] GO /****** Object: Table [dbo].[PERSON_LOG] Script Date: 2012/10/11 14:12:42 ******/ SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER ON GO SET ANSI_PADDING ON GO CREATE TABLE [dbo].[PERSON_LOG]( [ID] [int] NULL, [NAME] [varchar](50) NULL, [DAT] [varchar](8) NULL, [TIM] [varchar](6) NULL ) ON [PRIMARY] GO SET ANSI_PADDING OFF GO ALTER TABLE [dbo].[PERSON_LOG] ADD CONSTRAINT [DF_TRIGGER_LOG_DAT] DEFAULT (CONVERT([char](8),getdate(),(112))) FOR [DAT] GO ALTER TABLE [dbo].[PERSON_LOG] ADD CONSTRAINT [DF_TRIGGER_LOG_TIM] DEFAULT (replace(CONVERT([char](8),getdate(),(108)),':','')) FOR [TIM] GO
建表LOGR，用于存放SQL：
USE [TESTDB] GO /****** Object: Table [dbo].[LOGR] Script Date: 2012/10/11 14:11:18 ******/ SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER ON GO SET ANSI_PADDING ON GO CREATE TABLE [dbo].[LOGR]( [USRNAM] [varchar](50) NULL, [STATMT] [varchar](max) NULL, [UPDDAT] [datetime] NULL, [TBLNAM] [varchar](50) NULL ) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY] GO SET ANSI_PADDING OFF GO
在PERSON表里建4个Trigger：
PERSON_LOGR用于收集SQL
USE [TESTDB]
GO
/****** Object: Trigger [dbo].[PERSON_LOGR] Script Date: 2012/10/11 14:14:03 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TRIGGER [dbo].[PERSON_LOGR] ON [dbo].[PERSON]
FOR INSERT, UPDATE, DELETE
AS
DECLARE @CLIENT AS VARCHAR(50)
DECLARE @DATETIME AS DATETIME
DECLARE @USERNAME AS VARCHAR(50)
DECLARE @STATMT AS VARCHAR(max)
DECLARE @strSQL AS VARCHAR(100)
SET @CLIENT = HOST_NAME()
SET @DATETIME = GETDATE()
SET @strSQL='DBCC INPUTBUFFER('+CAST(@@SPID AS VARCHAR(20))+')'
CREATE TABLE #STATEMENT (C1 VARCHAR(50),C2 VARCHAR(50),C3 VARCHAR(500))
INSERT INTO #STATEMENT EXEC(@strSQL)
SELECT @STATMT=C3 FROM #STATEMENT
INSERT INTO LOGR(USRNAM,STATMT,UPDDAT,TBLNAM) VALUES(@CLIENT,@STATMT,@DATETIME,'PERSON')
GO
PERSON_Insert用于收集INSERT的信息：
USE [TESTDB]
GO
/****** Object: Trigger [dbo].[PERSON_Insert] Script Date: 2012/10/11 14:13:41 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
-- =============================================
-- Author: <Author,,Name>
-- Create date: <Create Date,,>
-- Description: <Description,,>
-- =============================================
CREATE TRIGGER [dbo].[PERSON_Insert]
ON [dbo].[PERSON]
FOR INSERT
AS
BEGIN
SET NOCOUNT ON;
INSERT [dbo].[PERSON_LOG](ID,NAME)
SELECT * FROM INSERTED
END
GO
PERSON_UPDATE用于收集Update前后的数据：
USE [TESTDB]
GO
/****** Object: Trigger [dbo].[PERSON_UPDATE] Script Date: 2012/10/11 14:14:36 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
-- =============================================
-- Author: <Author,,Name>
-- Create date: <Create Date,,>
-- Description: <Description,,>
-- =============================================
CREATE TRIGGER [dbo].[PERSON_UPDATE]
ON [dbo].[PERSON]
FOR UPDATE
AS
BEGIN
SET NOCOUNT ON;
INSERT [dbo].[PERSON_LOG](ID,NAME)
SELECT * FROM INSERTED
INSERT [dbo].[PERSON_LOG](ID,NAME)
SELECT * FROM DELETED
END
GO
PERSON_DELETE 用于收集DELETE的信息：
USE [TESTDB]
GO
/****** Object: Trigger [dbo].[PERSON_DELETE] Script Date: 2012/10/11 14:13:07 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
-- =============================================
-- Author: <Author,,Name>
-- Create date: <Create Date,,>
-- Description: <Description,,>
-- =============================================
CREATE TRIGGER [dbo].[PERSON_DELETE]
ON [dbo].[PERSON]
FOR DELETE
AS
BEGIN
SET NOCOUNT ON;
INSERT [dbo].[PERSON_LOG](ID,NAME)
SELECT * FROM DELETED
END
GO