为什么使用事务
　　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。
显示设置事务

复制代码 代码如下:

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

复制代码 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

复制代码 代码如下:

alter database;
backup;
create database;
drop database;
reconfigure;
restore;
update statistics;

复制代码 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