- Adding a new hotel branch.
- Adding a new guest.
- Adding a new room.
- Booking a Room.
- Tracking a room reservation. (Available/Booked)
- Canceling a room reservation.
- Creating an event.
- Booking and Recommending hotel events.
- Validating Reservations.
Click to fly to the selected feature
- Add Hotel {procedure}
- Add Room {procedure}
- Add Guest {procedure}
- Book Room {procedure}
- Add Event {procedure}
- Cancel Room Reservation {procedure}
- Find Hotel {function}
- Find Room {function}
- Find Room Reservation {function}
- Find Event {function}
- Find Event Reservation {function}
- Room Registry Trigger {trigger}
- Cancel Room Registry Trigger {trigger}
- Creating Object Package {package}
- Finding Object Package {package}
Note: More features could be added later on to the project
-- Creating all tables
CREATE TABLE hotel(hotel_id number primary key,
hotel_name varchar2(25),
hotel_address varchar2(25),
hotel_phone varchar2(25)
);
CREATE TABLE room(room_id number primary key,
hotel_id number,
room_price number,
room_size varchar2(25),
room_capacity number,
CONSTRAINT room_fk FOREIGN KEY(hotel_id)
REFERENCES hotel(hotel_id),
CONSTRAINT room_size_ck
CHECK (Room_Size in ('small' , 'medium' , 'large' ))
);
CREATE TABLE guest(guest_id number primary key,
guest_name varchar2(25),
guest_phone varchar2(25),
guest_email varchar2(35)
);
CREATE TABLE room_reservation(room_id number,
guest_id number,
booking_id number,
booking_invoice number,
CONSTRAINT reserv_pk PRIMARY KEY(room_id,guest_id),
FOREIGN KEY(room_id) REFERENCES room(room_id),
FOREIGN KEY(guest_id) REFERENCES guest(guest_id)
);
CREATE TABLE event(event_id number primary key,
event_name varchar2(25)
);
CREATE TABLE event_in_hotel(event_id number,
guest_id number,
reserv_id number,
start_date date,
end_date date,
event_invoice number,
CONSTRAINT room_hotel_pk PRIMARY KEY(event_id,guest_id)
);
-- Creating a table that restores the availability of the room
CREATE TABLE room_registry(room_id number,
hotel_id number,
registry_date date,
room_availability varchar2(25),
CONSTRAINT registry_pk PRIMARY KEY(room_id, registry_date),
CHECK (Room_Availability in ('available' , 'booked' ))
);-
Adding hotels, rooms, guests, events.
-
Booking rooms and events.
-- Creating Sequence for Hotel_id
CREATE SEQUENCE hotel_seq START WITH 1 INCREMENT BY 1 MAXVALUE 999999 ORDER;
-- Creating a procedure to add new hotels
CREATE OR REPLACE PROCEDURE add_hotel(h_id number,
h_name varchar2,
h_address varchar2,
h_phone varchar2
) IS
BEGIN
INSERT INTO hotel VALUES(hotel_seq.nextval, h_name, h_address, h_phone);
END;-- Creating Sequence for room_id
CREATE SEQUENCE room_seq START WITH 1 INCREMENT BY 1 MAXVALUE 999999 ORDER;
-- Creating a procedure to add a new ROOM
CREATE OR REPLACE PROCEDURE add_room(r_id number,
h_id number,
r_price number,
r_size varchar2,
r_capacity number
) IS
unique_exception EXCEPTION;
PRAGMA EXCEPTION_INIT(unique_exception, -00001);
BEGIN
INSERT INTO room VALUES(room_seq.nextval, h_id, r_price, r_size, r_capacity);
EXCEPTION
WHEN unique_exception THEN
dbms_output.put_line(' The room size has to be one of the following: small, medium, large');
END;-- Creating Sequence for guest_id
CREATE SEQUENCE guest_seq START WITH 1 INCREMENT BY 1 MAXVALUE 999999 ORDER;
-- Creating a procedure to add a new GUEST
CREATE OR REPLACE PROCEDURE add_guest(g_id number,
g_name varchar2,
g_phone varchar2,
g_email varchar2
) IS
BEGIN
INSERT INTO guest VALUES(guest_seq.nextval, g_name, g_phone, g_email);
END;-- Creating Sequence for booking_id
CREATE SEQUENCE book_seq START WITH 1 INCREMENT BY 1 MAXVALUE 999999 ORDER;
-- Creating a procedure to book a reservation
CREATE OR REPLACE PROCEDURE book_room(r_id number,
g_id number,
b_id number,
b_invoice number
) IS
foreign_exception EXCEPTION;
PRAGMA EXCEPTION_INIT(foreign_exception, -02291);
BEGIN
INSERT INTO room_reservation VALUES(r_id, g_id, b_id, b_invoice);
EXCEPTION
WHEN no_data_found THEN
dbms_output.put_line(g_id || ' Is not a registered guest, Kindly registed the guest before booking a room');
WHEN foreign_exception THEN
dbms_output.put_line(' There is a foreign key constraint, Kindly consider the values');
END;-- Creating Sequence for event_id
CREATE SEQUENCE event_seq START WITH 1 INCREMENT BY 1 MAXVALUE 999999 ORDER;
-- Creating a procedure to add a new event
CREATE OR REPLACE PROCEDURE add_event(e_id number,
e_name varchar2
) IS
BEGIN
INSERT INTO event VALUES(event_seq.nextval, e_name);
END;-- Cancelling a room reservation
CREATE OR REPLACE PROCEDURE cancel_room_reservation(r_id number,
g_id number,
b_id number
) IS
BEGIN
DELETE FROM room_reservation WHERE room_id = r_id AND guest_id = g_id AND booking_id = b_id;
END;- Retrieving hotel, room, guest, room and event details.
-- Creating a function to retrieve a hotel
CREATE OR REPLACE FUNCTION find_hotel(h_id number) RETURN varchar2 IS
v_h_id hotel.hotel_id%type;
v_h_name hotel.hotel_name%type;
v_h_address hotel.hotel_address%type;
v_h_phone hotel.hotel_phone%type;
hotel_details varchar2(150);
BEGIN
SELECT hotel_id,
hotel_name,
hotel_address,
hotel_phone
INTO v_h_id,
v_h_name,
v_h_address,
v_h_phone
FROM hotel
WHERE hotel_id = h_id;
hotel_details := 'Hotel name is ' || v_h_name || ', The address is ' || v_h_address || ' and the phone number is ' || v_h_phone;
RETURN hotel_details;
END;-- Creating a function to retrieve room details
CREATE OR REPLACE FUNCTION find_room(r_id number) RETURN varchar2 IS
v_room_id room.room_id%type;
v_hotel_id room.hotel_id%type;
v_room_size room.room_size%type;
v_room_capacity room.room_capacity%type;
room_details varchar2(150);
BEGIN
SELECT room_id,
hotel_id,
room_size,
room_capacity
INTO v_room_id,
v_hotel_id,
v_room_size,
v_room_capacity
FROM room
WHERE room_id = r_id;
room_details := 'Room ID is ' ||v_room_id || ' That is in hotel ID ' || v_hotel_id || ' The room size is ' || v_room_size || ' and the capacity is ' || v_room_capacity;
RETURN room_details;
END;-- Creating a function to retrieve room_reservation details
CREATE OR REPLACE FUNCTION find_reservation(b_id number) RETURN varchar2 IS
v_room_id room_reservation.room_id%type;
v_guest_id room_reservation.guest_id%type;
v_booking_id room_reservation.booking_id%type;
v_booking_invoice room_reservation.booking_invoice%type;
reservation_details varchar2(150);
BEGIN
SELECT room_id,
guest_id,
booking_id,
booking_invoice
INTO v_room_id,
v_guest_id,
v_booking_id,
v_booking_invoice
FROM room_reservation
WHERE booking_id = b_id;
reservation_details := 'Room ' || v_room_id || ' Is reserved for ' || v_guest_id || ' with a booking ID ' || v_booking_id || ' and a booking invoice of approx. ' || v_booking_invoice;
RETURN reservation_details;
END;-- Creating a function to retrieve event details
CREATE OR REPLACE FUNCTION find_event(e_id number) RETURN varchar2 IS
v_event_id event.event_id%type;
v_event_name event.event_name%type;
event_details VARCHAR2(150);
BEGIN
SELECT event_id,
event_name
INTO v_event_id,
v_event_name
FROM event
WHERE event_id = e_id;
event_details := 'Event id ' || v_event_id || ' is ' || v_event_name;
RETURN event_details;
END;-- Creating a function to retrieve event reservation details
CREATE OR REPLACE FUNCTION find_event_reservation(e_id number) RETURN varchar2 IS
v_event_id event_in_hotel.event_id%type;
v_guest_id event_in_hotel.guest_id%type;
v_reserv_id event_in_hotel.reserv_id%type;
v_start_date event_in_hotel.start_date%type;
v_end_date event_in_hotel.end_date%type;
v_event_invoice event_in_hotel.event_invoice%type;
event_reservation_details varchar2(250);
BEGIN
SELECT event_id,
guest_id,
reserv_id,
start_date,
end_date,
event_invoice
INTO v_event_id,
v_guest_id,
v_reserv_id,
v_start_date,
v_end_date,
v_event_invoice
FROM event_in_hotel
WHERE event_id = e_id;
event_reservation_details := 'Event ' || v_event_id || ' which is booked by guest ID ' || v_guest_id || ' with a reservation id ' || v_reserv_id || ' has started on ' || v_start_date ||
' and an end date of ' || v_end_date || ' and its invoice is ' || v_event_invoice;
RETURN event_reservation_details;
END;-- Creating a trigger to track room's availability in case a room was reserved
CREATE OR REPLACE TRIGGER room_registry_trg
AFTER INSERT ON room_reservation
REFERENCING NEW AS New OLD AS Old
FOR EACH ROW
BEGIN
INSERT INTO room_registry VALUES(:Old.room_id, :Old.hotel_id, sysdate, 'booked');
END;-- Creating a trigger to track room's availablility in case a room was cancelled
CREATE OR REPLACE TRIGGER cancel_room_registry_trg
AFTER DELETE ON room_reservation
REFERENCING NEW AS New OLD AS Old
FOR EACH ROW
BEGIN
INSERT INTO room_registry VALUES(:Old.room_id, :Old.hotel_id, sysdate, 'available');
END;-- Package Specs
CREATE OR REPLACE PACKAGE create_object IS
PROCEDURE add_hotel(h_id number,
h_name varchar2,
h_address varchar2,
h_phone varchar2
);
PROCEDURE add_room(r_id number,
h_id number,
r_price number,
r_size varchar2,
r_capacity number
);
PROCEDURE add_guest(g_id number,
g_name varchar2,
g_phone varchar2,
g_email varchar2
);
PROCEDURE book_room(r_id number,
g_id number,
b_id number,
b_invoice number
);
PROCEDURE add_event(e_id number,
e_name varchar2
);
PROCEDURE cancel_room_reservation(r_id number,
g_id number,
b_id number
);
END;
-- Package Body
CREATE OR REPLACE PACKAGE BODY create_object IS
PROCEDURE add_hotel(h_id number,
h_name varchar2,
h_address varchar2,
h_phone varchar2
) IS
BEGIN
INSERT INTO hotel VALUES(hotel_seq.nextval, h_name, h_address, h_phone);
END;
PROCEDURE add_room(r_id number,
h_id number,
r_price number,
r_size varchar2,
r_capacity number
) IS
unique_exception EXCEPTION;
PRAGMA EXCEPTION_INIT(unique_exception, -00001);
BEGIN
INSERT INTO room VALUES(room_seq.nextval, h_id, r_price, r_size, r_capacity);
EXCEPTION
WHEN unique_exception THEN
dbms_output.put_line(' The room size has to be one of the following: small, medium, large');
END;
PROCEDURE add_guest(g_id number,
g_name varchar2,
g_phone varchar2,
g_email varchar2
) IS
BEGIN
INSERT INTO guest VALUES(guest_seq.nextval, g_name, g_phone, g_email);
END;
PROCEDURE book_room(r_id number,
g_id number,
b_id number,
b_invoice number
) IS
foreign_exception EXCEPTION;
PRAGMA EXCEPTION_INIT(foreign_exception, -02291);
BEGIN
INSERT INTO room_reservation VALUES(r_id, g_id, b_id, b_invoice);
EXCEPTION
WHEN no_data_found THEN
dbms_output.put_line(g_id || ' Is not a registered guest, Kindly registed the guest before booking a room');
WHEN foreign_exception THEN
dbms_output.put_line(' There is a foreign key constraint, Kindly consider the values');
END;
PROCEDURE add_event(e_id number,
e_name varchar2
) IS
BEGIN
INSERT INTO event VALUES(event_seq.nextval, e_name);
END;
PROCEDURE cancel_room_reservation(r_id number,
g_id number,
b_id number
) IS
BEGIN
DELETE FROM room_reservation WHERE room_id = r_id AND guest_id = g_id AND booking_id = b_id;
END;
END;-- Package Spec
CREATE OR REPLACE PACKAGE find_object IS
FUNCTION find_hotel(h_id number) RETURN varchar2;
FUNCTION find_room(r_id number) RETURN varchar2;
FUNCTION find_reservation(b_id number) RETURN varchar2;
FUNCTION find_event(e_id number) RETURN varchar2;
FUNCTION find_event_reservation(e_id number) RETURN varchar2;
END;
-- Package Body
CREATE OR REPLACE PACKAGE BODY find_object IS
FUNCTION find_hotel(h_id number) RETURN varchar2 IS
v_h_id hotel.hotel_id%type;
v_h_name hotel.hotel_name%type;
v_h_address hotel.hotel_address%type;
v_h_phone hotel.hotel_phone%type;
hotel_details varchar2(150);
BEGIN
SELECT hotel_id,
hotel_name,
hotel_address,
hotel_phone
INTO v_h_id,
v_h_name,
v_h_address,
v_h_phone
FROM hotel
WHERE hotel_id = h_id;
hotel_details := 'Hotel name is ' || v_h_name || ', The address is ' || v_h_address || ' and the phone number is ' || v_h_phone;
RETURN hotel_details;
END;
FUNCTION find_room(r_id number) RETURN varchar2 IS
v_room_id room.room_id%type;
v_hotel_id room.hotel_id%type;
v_room_size room.room_size%type;
v_room_capacity room.room_capacity%type;
room_details varchar2(150);
BEGIN
SELECT room_id,
hotel_id,
room_size,
room_capacity
INTO v_room_id,
v_hotel_id,
v_room_size,
v_room_capacity
FROM room
WHERE room_id = r_id;
room_details := 'Room ID is ' ||v_room_id || ' That is in hotel ID ' || v_hotel_id || ' The room size is ' || v_room_size || ' and the capacity is ' || v_room_capacity;
RETURN room_details;
END;
FUNCTION find_reservation(b_id number) RETURN varchar2 IS
v_room_id room_reservation.room_id%type;
v_guest_id room_reservation.guest_id%type;
v_booking_id room_reservation.booking_id%type;
v_booking_invoice room_reservation.booking_invoice%type;
reservation_details varchar2(150);
BEGIN
SELECT room_id,
guest_id,
booking_id,
booking_invoice
INTO v_room_id,
v_guest_id,
v_booking_id,
v_booking_invoice
FROM room_reservation
WHERE booking_id = b_id;
reservation_details := 'Room ' || v_room_id || ' Is reserved for ' || v_guest_id || ' with a booking ID ' || v_booking_id || ' and a booking invoice of approx. ' || v_booking_invoice;
RETURN reservation_details;
END;
FUNCTION find_event(e_id number) RETURN varchar2 IS
v_event_id event.event_id%type;
v_event_name event.event_name%type;
event_details VARCHAR2(150);
BEGIN
SELECT event_id,
event_name
INTO v_event_id,
v_event_name
FROM event
WHERE event_id = e_id;
event_details := 'Event id ' || v_event_id || ' is ' || v_event_name;
RETURN event_details;
END;
FUNCTION find_event_reservation(e_id number) RETURN varchar2 IS
v_event_id event_in_hotel.event_id%type;
v_guest_id event_in_hotel.guest_id%type;
v_reserv_id event_in_hotel.reserv_id%type;
v_start_date event_in_hotel.start_date%type;
v_end_date event_in_hotel.end_date%type;
v_event_invoice event_in_hotel.event_invoice%type;
event_reservation_details varchar2(250);
BEGIN
SELECT event_id,
guest_id,
reserv_id,
start_date,
end_date,
event_invoice
INTO v_event_id,
v_guest_id,
v_reserv_id,
v_start_date,
v_end_date,
v_event_invoice
FROM event_in_hotel
WHERE event_id = e_id;
event_reservation_details := 'Event ' || v_event_id || ' which is booked by guest ID ' || v_guest_id || ' with a reservation id ' || v_reserv_id || ' has started on ' || v_start_date ||
' and an end date of ' || v_end_date || ' and its invoice is ' || v_event_invoice;
RETURN event_reservation_details;
END;
END;