Question

创建触发器以插入数据时出现问题。我有2台计算机，我想为每个人的订单写一个网站，并按时间出租。但是我在编写出租功能以将数据插入订单表时遇到了麻烦。如果计算机的ID = 1，则在7:00 am-9：00 am、12：00到14:00订购因此，如何防止用户在当时或过去使用触发器将其放置

我尝试编写一个触发器，但是不起作用

==========================Booking====================
id_booking  |id_user    |total_price    |status_booking |id_cpt |start_time                 |end_time   |time_create
3             1              NULL               NULL        22   1998-01-01 01:00:00.000  1998-01-01 03:00:00.000            NULL
4             1              NULL               NULL        22   1998-01-01 05:00:00.000  1998-01-01 07:00:00.000            NULL
5             2              NULL               NULL        23   1998-01-01 07:00:00.000  1998-01-01 09:00:00.000            NULL
========================================================


======================Computers==========================
id_cpt  code_computer   id_status_cpt   id_room
22          VIP01                  1    1
23          VIP02                  1    1
=========================================================

我的触发器

SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
-- =============================================
-- Author:      <Author,,Name>
-- Create date: <Create Date,,>
-- Description: <Description,,>
-- =============================================
CREATE TRIGGER beginInsert
ON  booking
for insert
AS 
BEGIN
--BEGIN DECALRE---
declare @id_user int
declare @total_price int
declare @status_booking int
declare @id_cpt int
declare @start_time datetime
declare @end_time datetime
declare @time_create datetime 
declare @start_time_oder datetime
declare @end_time_order datetime


declare @check_time bit
--END DECALRE---

--SET VALUE OF VARIABLE---

select @id_cpt=id_cpt, @start_time_oder=@start_time_oder, @end_time_order=@end_time_order, @status_booking=0, @check_time=0
from inserted

--GET TIME IN BOOKING TO CHECK--

select @start_time=booking.start_time, @end_time=booking.end_time from booking

--END GET TIME IN BOOKING TO CHECK--

--SET VALUE OF VARIABLE---



if (@start_time_oder <@end_time_order)

    begin
        print(@start_time)
        print(@start_time_oder)
        if (@start_time_oder < @start_time and @end_time_order <@start_time) or (@start_time_oder > @end_time and @end_time_order >@end_time)

            begin

                insert into booking values(@id_user, @total_price, @status_booking,@id_cpt,@start_time_oder, @end_time_order, @time_create)

            end

        else

                rollback transaction
    end
else
    rollback transaction

END 开始

预期结果：当用户选择一台计算机id = 22并进行订购时，自1998年1月1日01：00：00.000至1998年1月1日03：00：00.000和1998年1月1日05:00以来，用户无法订购此计算机： 00.000至1998-01-01 07：00：00.000

非常感谢！

为插入数据创建触发器时出错

0 个答案: