Курсовая работа: Автоматизированная система бронирования авиабилетов

)

RETURNS int

BEGIN

DECLARE @count int;

IF EXISTS (SELECT OrderID FROM Orders WHERE FlightID=@flightID

AND Number2cl>0)

SELECT @count=Aircrafts.Count2

-(SELECT SUM(Number2cl) FROM Orders WHERE FlightID=@flightID)

FROM Flights,Aircrafts WHERE Flights.FlightID=@flightID

AND Flights.AircraftID=Aircrafts.AircraftID

ELSE

SELECT @count=Aircrafts.Count2

FROM Flights,Aircrafts WHERE Flights.FlightID=@flightID

AND Flights.AircraftID=Aircrafts.AircraftID

RETURN @count

END

Для получения информации по рейсам было создано представление FlightView:

CREATE VIEW [dbo].[FlightView] AS

SELECT

FlightID,

DateDeparture,

DateArrival,

dbo.timeFlight(DateArrival,DateDeparture) AS TimeFlight,

CityDepartureID,

CityArrivalID,

DepartureCities.CityName AS CityDeparture,

ArrivalCities.CityName AS CityArrival,

CompanyName,

AircraftModel,