SQL 事物

/*创建表*/
CREATE TABLE a
([id] int IDENTITY(1,1) PRIMARY KEY ,
[Name] varchar(50)
)

CREATE TABLE B
(
[id] int IDENTITY(1,1) PRIMARY KEY,
[Type] varchar(50),
[aid] int 
Foreign key ([aid]) references a(ID) 
 )
--创建存储过程
CREATE PROCEDURE [dbo].[ADD]
(@strName varchar(50), @strType varchar(50)) 
as
DECLARE @aid int
begin tran    
begin try     
INSERT INTO A ([name]) VALUES (@strName) 
--DECLARE @aid int=SELECT IDENT_SEED('A')
INSERT INTO B ([type],[aid]) VALUES(@strType,@@identity)  
end try   
begin catch  
if @@trancount > 0   
rollback tran   
end catch  
if @@trancount > 0   
commit tran

--执行存储过程
EXEC  [ADD] 'fff','fff'
--查询结果
SELECT * FROM A 
SELECT * FROM b 

--1. 在事务语句最前面加上set xact_abort on
   set xact_abort on
   begin tran
      update statement 1 ...
      update statement 2 ...
      delete statement 3 ...
   commit tran
   go

--2. 在每个单独的DML语句执行后，立即判断执行状态，并做相应处理。
 begin tran
      update statement 1 ...
      if @@error <> 0 begin
         rollback tran
         goto labend
      end
      delete statement 2 ...
      if @@error <> 0 begin
         rollback tran
         goto labend
      end
   commit tran
      labend:
   go

--3. 在SQL Server 2005中，可利用 try...catch 异常处理机制
   begin tran
   begin try
      update statement 1 ...
      delete statement 2 ...
   end try
   begin catch
      if @@trancount > 0
         rollback tran
   end catch
   if @@trancount > 0
      commit tran
   go

set xact_abort on --开启默认系统事物 非自定义错误回滚
begin tran  
-----------------------------------
declare @tbname nvarchar(100)
declare @create nvarchar(500)
declare cur1 cursor for 
select name from sysobjects where xtype='U' AND ( charindex('louxiqu',name)>0 OR charindex('louxinqu',name)>0  )
OPEN cur1
fetch cur1 into @tbname
while  @@FETCH_STATUS = 0
BEGIN
--------------------------
if   object_id('MCJZYFDATA.dbo.'+@tbname) is not null  
BEGIN
if   object_id('Bak_MCJZYFDATA.dbo.'+@tbname) is not null  
BEGIN
EXEC(' DROP TABLE Bak_MCJZYFDATA.dbo.'+@tbname+'' );
END
SET @create=' SELECT * INTO Bak_MCJZYFDATA.dbo.'+@tbname+' from MCJZYFDATA.dbo.'+@tbname
EXEC(@create);
EXEC(' DROP TABLE MCJZYFDATA.dbo.'+@tbname+'' );
--print @create
END
--------------------------
fetch cur1 INTO @tbname
end
close cur1
deallocate cur1
-----------------------------------
commit tran
go


-------------------


ALTER Proc [dbo].[BakTable](
@tbname Nvarchar(500)
)
as

Declare @sql Nvarchar(2000)
Declare @baktbname Nvarchar(500)
SET @baktbname=@tbname+replace(replace(replace(CONVERT(varchar, getdate(), 120 ),'-',''),' ',''),':','')
SET @sql=' SELECT * INTO Bak_MCJZYFDATA.dbo.'+@baktbname+' from MCJZYFDATA.dbo.'+@tbname
exec(@sql)


--exec BakTable 'Config' 备份表存储过程