存储过程和事务创建

/*alter 修改*/create proc InsertOrder
    @OrderCode nvarchar(50),
    @CusId int
as
begin
    begin tran--开启事务
    begin try
        --计算总金额
        declare @totalPri decimal(8,2)
        select @totalPri=sum(price*[count]) from carinfo where cusid=@CusId
        --向主表插入数据
        insert into ordermaster(ocode,odate,oprice,cusid) values(@OrderCode,GETDATE(),@totalPri,@CusId)

        --向从表插入数据
        insert into orderslave(bid,bcount,ordercode) select bookid,[count],@OrderCode from carinfo where cusid=@CusId

        --删除购物车中的数据
        delete from carInfo where CusId=@CusId

        commit tran--提交事务
    end try

    begin catch
        rollback tran--一旦发生异常，回滚事务
    end catch
end