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10_stored_routines_as_functions/script.sql

@@ -1 +1,25 @@
--- Write your SQL code here
+-- Write your SQL code here
+CREATE FUNCTION BookFlight(
+    IN p_flight_number INT,
+    IN p_passenger_id INT,
+    IN p_seat_number INT
+)
+RETURNS BOOLEAN
+BEGIN
+  DECLARE available_seats INT;
+
+  SELECT AvailableSeats INTO available_seats
+  FROM Flights
+  WHERE FlightNumber = p_flight_number;
+
+  IF available_seats > 0 THEN
+    INSERT INTO Bookings (FlightNumber, PassengerID, SeatNumber, BookingDate)
+    VALUES (p_flight_number, p_passenger_id, p_seat_number, NOW());
+    UPDATE Flights
+    SET AvailableSeats = AvailableSeats - 1
+    WHERE FlightNumber = p_flight_number;
+    RETURN TRUE;
+  ELSE
+    RETURN FALSE;
+  END IF;
+END;

11_views/script.sql

@@ -1 +1,27 @@
--- Write your SQL code here
+-- Write your SQL code here
+CREATE VIEW AirportPerformance AS
+SELECT 
+    a.AirportCode,
+    a.AirportName,
+    AVG(TIMEDIFF(f.ActualArrivalTime, f.ScheduledArrivalTime)) AS AverageDelay,
+    COUNT(*) AS TotalFlights,
+    COUNT(CASE WHEN f.FlightStatus = 'On Time' THEN 1 ELSE NULL END) AS OnTimeFlights
+FROM 
+    Airports a
+INNER JOIN Flights f ON a.AirportCode = f.DepartureAirportCode
+GROUP BY 
+    a.AirportCode, a.AirportName;
+
+
+    CREATE VIEW HighRevenueFlights AS
+SELECT 
+    f.FlightNumber,
+    SUM(b.Fare) AS TotalRevenue
+FROM 
+    Flights f
+INNER JOIN Bookings b ON f.FlightNumber = b.FlightNumber
+GROUP BY 
+    f.FlightNumber
+ORDER BY 
+    TotalRevenue DESC
+LIMIT 10;

12_database_transactions/script.sql

@@ -1 +1,35 @@
--- Write your SQL code here
+-- Write your SQL code here
+START TRANSACTION;
+
+UPDATE Flights
+SET FlightStatus = 'Cancelled'
+WHERE FlightNumber = 123;
+
+UPDATE Bookings
+SET BookingStatus = 'Cancelled'
+WHERE FlightNumber = 123;
+
+COMMIT;
+
+
+START TRANSACTION;
+
+UPDATE Bookings
+SET RefundStatus = 'Refunded'
+WHERE BookingID = 123;
+
+INSERT INTO Refunds (BookingID, RefundAmount, RefundDate)
+VALUES (123, 500, NOW());
+
+COMMIT;
+
+START TRANSACTION;
+
+INSERT INTO Bookings (FlightNumber, PassengerID, SeatNumber, BookingDate)
+VALUES (123, 456, '10A', NOW());
+
+UPDATE Flights
+SET AvailableSeats = AvailableSeats - 1
+WHERE FlightNumber = 123;
+
+COMMIT;

1_database/script.sql

@@ -1 +1,55 @@
--- Write your SQL code here
+-- Write your SQL code here
+CREATE DATABASE airport_system;
+USE airport_system;
+
+-- Create the tables
+CREATE TABLE airlines (
+    airline_id INT PRIMARY KEY AUTO_INCREMENT,
+    airline_name VARCHAR(50) NOT NULL,
+    country VARCHAR(50)
+) ENGINE=InnoDB;
+
+CREATE TABLE airports (
+    airport_code CHAR(3) PRIMARY KEY,
+    airport_name VARCHAR(100) NOT NULL,
+    city VARCHAR(50),
+    country VARCHAR(50)
+) ENGINE=InnoDB;
+
+CREATE TABLE flights (
+    flight_id INT PRIMARY KEY AUTO_INCREMENT,
+    airline_id INT,
+    flight_number INT,
+    departure_airport CHAR(3),
+    arrival_airport CHAR(3),
+    departure_time DATETIME,
+    arrival_time DATETIME,
+    aircraft_id INT,
+    FOREIGN KEY (airline_id) REFERENCES airlines(airline_id),
+    FOREIGN KEY (departure_airport) REFERENCES airports(airport_code),
+    FOREIGN KEY (arrival_airport) REFERENCES airports(airport_code)
+) ENGINE=InnoDB
+INDEX(departure_time), INDEX(arrival_time);
+
+CREATE TABLE aircraft (
+    aircraft_id INT PRIMARY KEY,
+    aircraft_type VARCHAR(50),
+    capacity INT
+) ENGINE=InnoDB;
+
+CREATE TABLE passengers (
+    passenger_id INT PRIMARY KEY AUTO_INCREMENT,
+    first_name VARCHAR(50) NOT NULL,
+    last_name VARCHAR(50) NOT NULL,
+    passport_number VARCHAR(20) UNIQUE
+) ENGINE=InnoDB;
+
+CREATE TABLE bookings (
+    booking_id INT PRIMARY KEY AUTO_INCREMENT,
+    passenger_id INT,
+    flight_id INT,
+    seat_number INT,
+    booking_date DATETIME,
+    FOREIGN KEY (passenger_id) REFERENCES passengers(passenger_id),
+    FOREIGN KEY (flight_id) REFERENCES flights(flight_id)
+) ENGINE=InnoDB;

2_base_tables/script.sql

@@ -1 +1,21 @@
--- Write your SQL code here
+-- Write your SQL code here
+CREATE TABLE Flights (
+    FlightNumber INT PRIMARY KEY,
+    DepartureDateTime DATETIME NOT NULL,
+    ArrivalDateTime DATETIME NOT NULL,
+    DepartureAirportCode CHAR(3) NOT NULL,
+    FOREIGN KEY (DepartureAirportCode) REFERENCES Airports(AirportCode)
+);
+
+CREATE TABLE Passengers (
+    PassengerID INT PRIMARY KEY AUTO_INCREMENT,
+    FirstName VARCHAR(50) NOT NULL,
+    LastName VARCHAR(50) NOT NULL
+);
+
+CREATE TABLE Airports (
+    AirportCode CHAR(3) PRIMARY KEY,
+    AirportName VARCHAR(100) NOT NULL,
+    Country VARCHAR(50) NOT NULL
+);
+

3_normal_triggers/script.sql

@@ -1 +1,41 @@
--- Write your SQL code here
+-- Write your SQL code here
+CREATE TRIGGER prevent_overbooking
+BEFORE INSERT ON Bookings
+FOR EACH ROW
+BEGIN
+  DECLARE v_available_seats INT;
+
+  SELECT COUNT(*) INTO v_available_seats
+  FROM Flights
+  WHERE FlightNumber = NEW.FlightNumber;
+
+  SELECT COUNT(*) INTO v_booked_seats
+  FROM Bookings
+  WHERE FlightNumber = NEW.FlightNumber;
+
+  IF v_booked_seats >= v_available_seats THEN
+    SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = 'Flight is fully booked.';
+  END IF;
+END;
+
+CREATE TRIGGER log_flight_changes
+AFTER UPDATE ON Flights
+FOR EACH ROW
+BEGIN
+  IF OLD.FlightStatus <> NEW.FlightStatus THEN
+    INSERT INTO FlightLogs (FlightNumber, OldStatus, NewStatus, Reason)
+    VALUES (NEW.FlightNumber, OLD.FlightStatus, NEW.FlightStatus, NEW.DelayReason);
+  END IF;
+END;
+
+CREATE TRIGGER update_passenger_status_on_cancellation
+AFTER UPDATE ON Flights
+FOR EACH ROW
+BEGIN
+  IF NEW.FlightStatus = 'Cancelled' THEN
+    UPDATE Bookings
+    SET BookingStatus = 'Cancelled'
+    WHERE FlightNumber = NEW.FlightNumber;
+  END IF;
+END;
+

4_check_constraints/script.sql

@@ -1 +1,35 @@
--- Write your SQL code here
+-- Write your SQL code here
+CREATE TABLE Flights (
+    FlightNumber INT PRIMARY KEY,
+    DepartureDateTime DATETIME NOT NULL,
+    ArrivalDateTime DATETIME NOT NULL,
+    DepartureAirportCode CHAR(3) NOT NULL,
+    ArrivalAirportCode CHAR(3) NOT NULL,
+    FOREIGN KEY (DepartureAirportCode) REFERENCES Airports(AirportCode),
+    FOREIGN KEY (ArrivalAirportCode) REFERENCES Airports(AirportCode), 1 
+    CHECK (ArrivalDateTime > DepartureDateTime) -- Ensure arrival time is after departure time
+) ENGINE=InnoDB
+INDEX(DepartureDateTime), INDEX(ArrivalDateTime);
+
+CREATE TABLE Passengers (
+    PassengerID INT PRIMARY KEY AUTO_INCREMENT,
+    FirstName VARCHAR(50) NOT NULL,
+    LastName VARCHAR(50) NOT NULL,
+    Age INT CHECK (Age >= 0) -- Ensure age is non-negative
+) ENGINE=InnoDB;
+CREATE TABLE Bookings (
+    BookingID INT PRIMARY KEY AUTO_INCREMENT,
+    FlightNumber INT,
+    PassengerID INT,
+    SeatNumber INT,
+    BookingDate DATETIME,
+    FOREIGN KEY (FlightNumber) REFERENCES Flights(FlightNumber),
+    FOREIGN KEY (PassengerID) REFERENCES Passengers(PassengerID),
+    CHECK (SeatNumber BETWEEN 1 AND (SELECT Capacity FROM Aircraft WHERE AircraftID = (SELECT AircraftID FROM Flights WHERE FlightNumber = Bookings.FlightNumber))) -- Ensure seat number is within aircraft capacity
+) ENGINE=InnoDB;
+
+CREATE TABLE Airports (
+    AirportCode CHAR(3) PRIMARY KEY,
+    AirportName VARCHAR(100) NOT NULL,
+    Country VARCHAR(50) NOT NULL
+) ENGINE=InnoDB;

5_temporal_triggers/script.sql

@@ -1 +1,59 @@
--- Write your SQL code here
+-- Write your SQL code here
+CREATE EVENT update_flight_status
+ON SCHEDULE EVERY 5 MINUTE
+DO
+BEGIN
+  DECLARE cur_flight CURSOR FOR
+    SELECT FlightNumber
+    FROM Flights
+    WHERE DepartureDateTime BETWEEN NOW() AND NOW() + INTERVAL 1 DAY;
+
+  OPEN cur_flight;
+
+  FETCH cur_flight INTO v_flight_number;
+
+  WHILE ROW_COUNT() > 0 DO
+    -- Fetch real-time flight status for v_flight_number
+    SET v_flight_status = /* Fetch status from external source */;
+    SET v_actual_departure_time = /* Fetch actual departure time */;
+    SET v_actual_arrival_time = /* Fetch actual arrival time */;
+    SET v_delay_reason = /* Fetch delay reason */;
+
+    UPDATE Flights
+    SET FlightStatus = v_flight_status,
+        ActualDepartureTime = v_actual_departure_time,
+        ActualArrivalTime = v_actual_arrival_time,
+        DelayReason = v_delay_reason
+    WHERE FlightNumber = v_flight_number;
+
+    -- Send notifications to passengers and staff
+    CALL send_flight_status_notifications(v_flight_number, v_flight_status, v_delay_reason);
+
+    FETCH cur_flight INTO v_flight_number;
+  END WHILE;
+
+  CLOSE cur_flight;
+END;
+
+CREATE EVENT send_check_in_reminders
+ON SCHEDULE EVERY 1 DAY
+DO
+BEGIN
+  DECLARE cur_booking CURSOR FOR
+    SELECT PassengerID, Email, PhoneNumber, FlightNumber
+    FROM Bookings
+    WHERE DepartureDateTime BETWEEN NOW() + INTERVAL 1 DAY AND NOW() + INTERVAL 2 DAY;
+
+  OPEN cur_booking;
+
+  FETCH cur_booking INTO v_passenger_id, v_email, v_phone_number, v_flight_number;
+
+  WHILE ROW_COUNT() > 0 DO
+    CALL send_check_in_email(v_email, v_flight_number);
+    CALL send_check_in_sms(v_phone_number, v_flight_number);
+
+    FETCH cur_booking INTO v_passenger_id, v_email, v_phone_number, v_flight_number;
+  END WHILE;
+
+  CLOSE cur_booking;
+END;

6_storage_engines/script.sql

@@ -1 +1,14 @@
--- Write your SQL code here
+-- Write your SQL code here
+CREATE FUNCTION get_passenger_info(passenger_id INT)
+RETURNS VARCHAR(255)
+BEGIN
+  DECLARE first_name VARCHAR(50);
+  DECLARE last_name VARCHAR(50);
+
+  SELECT FirstName, LastName
+  INTO first_name, last_name
+  FROM Passengers
+  WHERE PassengerID = passenger_id;
+
+  RETURN CONCAT(first_name, ' ', last_name);
+END;

7_indexes/script.sql

@@ -1 +0,0 @@
--- Write your SQL code here

9_stored_routines_as_procedures/script.sql

@@ -1 +1,25 @@
--- Write your SQL code here
+-- Write your SQL code here
+CREATE PROCEDURE BookFlight(
+    IN p_flight_number INT,
+    IN p_passenger_id INT,
+    IN p_seat_number INT
+)
+BEGIN
+  DECLARE available_seats INT;
+
+  SELECT AvailableSeats INTO available_seats
+  FROM Flights
+  WHERE FlightNumber = p_flight_number;
+
+  IF available_seats > 0 THEN
+    START TRANSACTION;
+    INSERT INTO Bookings (FlightNumber, PassengerID, SeatNumber, BookingDate)
+    VALUES (p_flight_number, p_passenger_id, p_seat_number, NOW());
+    UPDATE Flights
+    SET AvailableSeats = AvailableSeats - 1
+    WHERE FlightNumber = p_flight_number;
+    COMMIT;
+  ELSE
+    SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = 'Flight is fully booked.';
+  END IF;
+END;

README.md

@@ -1,3 +1,4 @@
+[![Review Assignment Due Date](https://classroom.github.com/assets/deadline-readme-button-22041afd0340ce965d47ae6ef1cefeee28c7c493a6346c4f15d667ab976d596c.svg)](https://classroom.github.com/a/fbNyN1as)
 # BBT3104: Advanced Database Sytems Semester Project
 
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