火车售票系统课程设计sqlserver,包括相应的触发器和存储器的具体代码
时间: 2023-06-16 20:08:36 浏览: 52
这是一个比较大的课程设计,需要根据具体的需求和设计进行不同的实现。下面是一个简单的示例,仅供参考。
首先,我们需要创建一些基本的表格来存储信息,比如车次表、车站表、座位表、订单表等等。下面是一个可能的表格设计:
```
-- 车次表
CREATE TABLE Train (
TrainID int PRIMARY KEY,
TrainName nvarchar(50),
StartStationID int,
EndStationID int,
StartTime datetime,
EndTime datetime,
Price money
);
-- 车站表
CREATE TABLE Station (
StationID int PRIMARY KEY,
StationName nvarchar(50)
);
-- 座位表
CREATE TABLE Seat (
SeatID int PRIMARY KEY,
TrainID int,
StationID int,
SeatType nvarchar(50),
Price money,
TotalNum int,
RemainNum int,
CONSTRAINT FK_Seat_Train FOREIGN KEY (TrainID) REFERENCES Train(TrainID),
CONSTRAINT FK_Seat_Station FOREIGN KEY (StationID) REFERENCES Station(StationID)
);
-- 订单表
CREATE TABLE Order (
OrderID int PRIMARY KEY,
TrainID int,
StartStationID int,
EndStationID int,
SeatID int,
SeatType nvarchar(50),
Price money,
UserID int,
BuyTime datetime,
CONSTRAINT FK_Order_Train FOREIGN KEY (TrainID) REFERENCES Train(TrainID),
CONSTRAINT FK_Order_StartStation FOREIGN KEY (StartStationID) REFERENCES Station(StationID),
CONSTRAINT FK_Order_EndStation FOREIGN KEY (EndStationID) REFERENCES Station(StationID),
CONSTRAINT FK_Order_Seat FOREIGN KEY (SeatID) REFERENCES Seat(SeatID)
);
```
接下来,我们可以创建一些触发器和存储过程来实现一些特殊的逻辑。下面是一个可能的示例:
```
-- 在订单表中插入数据时,更新座位表中的余票数量
CREATE TRIGGER AfterInsertOrder ON Order
AFTER INSERT
AS
BEGIN
DECLARE @SeatID int, @RemainNum int
SELECT @SeatID = SeatID FROM inserted
SELECT @RemainNum = RemainNum FROM Seat WHERE SeatID = @SeatID
UPDATE Seat SET RemainNum = @RemainNum - 1 WHERE SeatID = @SeatID
END
-- 在订单表中删除数据时,更新座位表中的余票数量
CREATE TRIGGER AfterDeleteOrder ON Order
AFTER DELETE
AS
BEGIN
DECLARE @SeatID int, @RemainNum int
SELECT @SeatID = SeatID FROM deleted
SELECT @RemainNum = RemainNum FROM Seat WHERE SeatID = @SeatID
UPDATE Seat SET RemainNum = @RemainNum + 1 WHERE SeatID = @SeatID
END
-- 查询订单信息并计算总价
CREATE PROCEDURE GetOrderInfo
@OrderID int
AS
BEGIN
SELECT o.OrderID, t.TrainName, s1.StationName AS StartStation, s2.StationName AS EndStation,
se.SeatType, o.Price, u.UserName, o.BuyTime, se.Price * DATEDIFF(hour, t.StartTime, t.EndTime) AS TotalPrice
FROM [Order] o
JOIN Train t ON o.TrainID = t.TrainID
JOIN Station s1 ON o.StartStationID = s1.StationID
JOIN Station s2 ON o.EndStationID = s2.StationID
JOIN Seat se ON o.SeatID = se.SeatID
JOIN [User] u ON o.UserID = u.UserID
WHERE o.OrderID = @OrderID
END
```
当然,以上只是一个简单的示例,具体的实现还需要考虑更多的细节和逻辑。