SQLServer重温事务

当对多个表进行更新的时候，某条执行失败。为了保持数据的完整性，需要使用事务回滚

begin try 
begin transaction 
insert into shiwu (asd) values ('aasdasda'); 
commit transaction 
end try 
begin catch 
select ERROR_NUMBER() as errornumber 
rollback transaction 
end catch 
 
隐式设置事务 
 代码如下:

set implicit_transactions on; -- 启动隐式事务 
go 
begin try 
insert into shiwu (asd) values ('aasdasda'); 
insert into shiwu (asd) values ('aasdasda'); 
commit transaction; 
end try 
begin catch 
select ERROR_NUMBER() as errornumber 
rollback transaction; --回滚事务 
end catch 
set implicit_transactions off; --关闭隐式事务 
go 
 
显示事务以下语句不能使用，隐式事务可以 
 代码如下:

alter database; 
backup; 
create database; 
drop database; 
reconfigure; 
restore; 
update statistics; 
 
显示事务可以嵌套使用 
 代码如下:

--创建存储过程 
create procedure qiantaoProc 
@asd nchar(10) 
as 
begin 
begin try 
begin transaction innerTrans 
save transaction savepoint --创建事务保存点 
insert into shiwu (asd) values (@asd); 
commit transaction innerTrans 
end try 
begin catch 
rollback transaction savepoint --回滚到保存点 
commit transaction innerTrans 
end catch 
end 
go 
begin transaction outrans 
exec qiantaoProc 'asdasd'; 
rollback transaction outrans 
 
事务嵌套，回滚外层事务时，如果嵌套内的事务已经回滚过则会有异常。此时需要使用事务保存点。如上代码。