详解SQL死锁检测的方法

IF EXISTS(SELECT name FROM sysobjects WHERE name='goods_sort' AND xtype='U')
DROP TABLE dbo.goods_sort
--创建商品分类表
CREATE TABLE dbo.goods_sort(
iSortID int NOT NULL
CONSTRAINT PK_iSortID PRIMARY KEY
IDENTITY(1001,1),
sSortName NVARCHAR(20) NOT NULL
)
GO
INSERT INTO dbo.goods_sort VALUES('服饰')
INSERT INTO dbo.goods_sort VALUES('女包')
INSERT INTO dbo.goods_sort VALUES('鞋子')
INSERT INTO dbo.goods_sort VALUES('首饰')
INSERT INTO dbo.goods_sort VALUES('美容')
GO

IF EXISTS(SELECT name FROM sysobjects WHERE name='goods' AND xtype='U')
DROP TABLE dbo.goods;
--创建商品表
CREATE TABLE dbo.goods(
iID int NOT NULL
CONSTRAINT PK_iID PRIMARY KEY
IDENTITY(1,1),
iGoodsID varchar(20) NOT NULL,
sGoodsName nvarchar(100) NOT NULL,
iGoodTotal int NOT NULL
CONSTRAINT DF_iGoodTotal DEFAULT(0),
iPrice int NOT NULL
CONSTRAINT DF_iPrice DEFAULT(0),
iPriceTotal int NOT NULL,
iSortID int NOT NULL,
tAddDate smalldatetime NOT NULL
CONSTRAINT DF_tAddDate DEFAULT getdate()
)
GO
INSERT INTO dbo.goods
(iGoodsID,sGoodsName,iGoodTotal,iPrice,iPriceTotal,iSortID)
VALUES('YR6001','瘦身羽绒服',20,200,4000,1001)
INSERT INTO dbo.goods
(iGoodsID,sGoodsName,iGoodTotal,iPrice,iPriceTotal,iSortID)
VALUES('YR6002','加厚羽绒服',20,300,6000,1001)
INSERT INTO dbo.goods
(iGoodsID,sGoodsName,iGoodTotal,iPrice,iPriceTotal,iSortID)
VALUES('BB7001','小黄牛皮马鞍包',30,100,3000,1002)
INSERT INTO dbo.goods
(iGoodsID,sGoodsName,iGoodTotal,iPrice,iPriceTotal,iSortID)
VALUES('BB7002','十字绣流苏包',50,150,7500,1002)
GO

SET NOCOUNT ON;
SET XACT_ABORT ON;
GO
--使用TRY-CATCH，使代码发生错误也继续运行
BEGIN TRY
BEGIN TRAN
UPDATE dbo.goods_sort SET sSortName='女鞋' WHERE iSortID=1003;
WAITFOR DELAY '00:00:05';
UPDATE dbo.goods SET sGoodsName='胖子羽绒服' WHERE iID=2;
COMMIT TRAN
END TRY
BEGIN CATCH
IF (XACT_STATE()=-1)
ROLLBACK TRAN;
--ERROR_NUMBER()值为1205则表示发生了死锁
IF (ERROR_NUMBER() = 1205)
PRINT '事务1发生了死锁'
--写SQL Server日志或者返回错误给应用程序
END CATCH
SELECT iID,sGoodsName FROM dbo.goods WHERE iID=2;
SELECT iSortID,sSortName FROM dbo.goods_sort WHERE iSortID=1003;
GO 

SET NOCOUNT ON;
SET XACT_ABORT ON;
GO
--使用TRY-CATCH，使代码发生错误也继续运行
BEGIN TRY
BEGIN TRAN
UPDATE dbo.goods SET sGoodsName='瘦子羽绒服' WHERE iID=2;
WAITFOR DELAY '00:00:05';
UPDATE dbo.goods_sort SET sSortName='男鞋' WHERE iSortID=1003;
COMMIT TRAN
END TRY
BEGIN CATCH
IF (XACT_STATE()=-1)
ROLLBACK TRAN;
--ERROR_NUMBER()值为1205则表示发生了死锁
IF (ERROR_NUMBER() = 1205)
PRINT '事务2发生了死锁'
--写SQL Server日志或者返回错误给应用程序
END CATCH
SELECT iID,sGoodsName FROM dbo.goods WHERE iID=2;
SELECT iSortID,sSortName FROM dbo.goods_sort WHERE iSortID=1003;
GO