sql常用小知识 ---触发器-错误的使用

如果一个表，会被频繁的写入数据。则不要使用触发器的方式去将本表的数据同步其他的表。如果这样做会导致错误：

向服务器录入数据：事务(进程 ID 73)与另一个进程被死锁在 锁 资源上，并且已被选作死锁牺牲品。请重新

GO
/****** Object:  Trigger [dbo].[tr_DataSyncInsert]    Script Date: 03/19/2013 14:50:57 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
-- =============================================
-- Author:		<arvin>
-- Create date: <2012-11-29>
-- Description:	<insert同步数据>
-- =============================================
ALTER TRIGGER [dbo].[tr_DataSyncInsert]
ON  [dbo].[Open_AllItem]
AFTER INSERT
AS
BEGIN
SET NOCOUNT ON;
INSERT INTO dbo.Open_Item
SELECT
*
FROM dbo.Open_AllItem Where [Item_ID] IN (Select [Item_ID] From inserted)
INSERT INTO dbo.Open_Url
([CustomerID],[Brand_ID],[URL],[URLKEY])
SELECT [CustomerID],[Brand_ID],[Item_URL],[Item_URLKey] FROM dbo.Open_AllItem Where [Item_ID] IN (Select [Item_ID] From inserted)
END

解决方式：

大家可以使用事务的方式进行数据的同步。

USE [IwomData]
GO
/****** Object:  StoredProcedure [dbo].[pr_InsertItemFromCrawler]    Script Date: 03/19/2013 14:48:48 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
-- =============================================
-- Author:		<arvin>
-- Create date: <2012-11-29>
-- Description:	<将抓取到的数据插入到Open_Item表>
-- =============================================
ALTER PROCEDURE [dbo].[pr_InsertItemFromCrawler]
@Task_ID int,
@Brand_ID int,
@Item_URL varchar(1500),
@Item_URLKey varchar(32),
@Item_Content text,
@Item_Title nvarchar(200),
@Item_SDate smalldatetime,
@Item_ReleaseDate smalldatetime,
@Item_Author nvarchar(150),
@Item_ReplyCount int,
@Item_VisitCount int,
@Task_KeyWord nvarchar(80),
@SearchEngine_ID int,
@Item_SiteName nvarchar(20),
@Item_Info nvarchar(500),
@Item_Area nvarchar(500),
@CustomerID int,
@KeyWordID int
AS
BEGIN
SET NOCOUNT ON;
DECLARE @ITEM_ID INT;
SET @ITEM_ID=0;
declare @count int
print @Brand_ID;
print @Item_URLKey;
set @count=0;
select top 1 @count = 1 from dbo.Open_Url  with (nolock) where brand_id = @Brand_ID and URLKEY = @Item_URLKey and CustomerID=@CustomerID ;

begin transaction tran_bank;
declare @tran_error int;
set @tran_error = 0;
begin try
if(@count = 0)
begin
INSERT INTO dbo.Open_Url([CustomerID],[Brand_ID],[URL],[URLKEY])SELECT @CustomerID,@Brand_ID,@Item_URL,@Item_URLKey;
if(ISNULL(@Item_SiteName,'a')='a' or @Item_SiteName='')
begin
set @Item_SiteName=isnull(dbo.[fun_GetSiteName](@Item_URL),'')
end
INSERT INTO dbo.Open_AllItem (Task_ID,Brand_ID,Item_URL,Item_URLKey,Item_Title,Item_Content
,Item_SDate,Item_ReleaseDate,Item_Author,Item_ReplyCount,Item_VisitCount,Task_KeyWord
,SearchEngine_ID,Item_Info,Item_SiteName,CustomerID,Item_Area,KeyWordID)
VALUES
(@Task_ID,@Brand_ID,@Item_URL,@Item_URLKey,@Item_Title,@Item_Content,@Item_SDate,@Item_ReleaseDate
,@Item_Author,@Item_ReplyCount,@Item_VisitCount,@Task_KeyWord,@SearchEngine_ID,@Item_Info,@Item_SiteName,@CustomerID,@Item_Area,@KeyWordID)
select @ITEM_ID=SCOPE_IDENTITY();
INSERT INTO dbo.[Open_Item] (Task_ID,Brand_ID,Item_URL,Item_URLKey,Item_Title,Item_Content
,Item_SDate,Item_ReleaseDate,Item_Author,Item_ReplyCount,Item_VisitCount,Task_KeyWord
,SearchEngine_ID,Item_Info,Item_SiteName,CustomerID,Item_Area,KeyWordID,[Item_ID])
VALUES
(@Task_ID,@Brand_ID,@Item_URL,@Item_URLKey,@Item_Title,@Item_Content,@Item_SDate,@Item_ReleaseDate
,@Item_Author,@Item_ReplyCount,@Item_VisitCount,@Task_KeyWord,@SearchEngine_ID,@Item_Info,@Item_SiteName,@CustomerID,@Item_Area,@KeyWordID,@ITEM_ID)
select @ITEM_ID;
end
else
select 0;
end try
begin catch
set @tran_error = @tran_error + 1;
end catch
if (@tran_error > 0)
begin
--执行出错，回滚事务
rollback tran;
SELECT error_message();
end
else
begin
--没有异常，提交事务
commit tran;
SELECT @ITEM_ID;
end
END