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Faculty of Management and Business Technology Assignment 3 Database Concept EBI 103 Instructions: This is individual works

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Faculty of Management and Business Technology

Assignment 3 Database Concept EBI 103

Instructions:

1. This is individual works.
2. No submission will lead to marks zero to be given automatically.
3. Answer all questions.

Tasks

Table

Hotel (Hotel_No, Name, Address)

Room (Room_No, Hotel_No, Type, Price)

Booking (Hotel_No, Guest_No, Date_From, Date_To, Room_No)

Guest (Guest_No, Name, Address)

 

Create table without PK and FK

 

CREATE TABLE hotel

( hotel_no CHAR(4) NOT NULL,

  name VARCHAR(20) NOT NULL,

  address VARCHAR(50) NOT NULL);

 

CREATE TABLE room

( room_no VARCHAR(4) NOT NULL,

  hotel_no CHAR(4) NOT NULL,

  type CHAR(1) NOT NULL,

  price DECIMAL(5,2) NOT NULL);

 

CREATE TABLE booking

 (hotel_no CHAR(4) NOT NULL,

  guest_no CHAR(4) NOT NULL,

  date_from DATETIME NOT NULL,

  date_to DATETIME NULL,

  room_no CHAR(4) NOT NULL);

 

CREATE TABLE guest

( guest_no CHAR(4) NOT NULL,

  name VARCHAR(20) NOT NULL,

  address VARCHAR(50) NOT NULL);

 

Insert data

INSERT INTO hotel VALUES ('H111', 'Grosvenor Hotel‘, 'London');

INSERT INTO room VALUES ('1', 'H111', 'S', 72.00);

INSERT INTO guest VALUES ('G111', 'John Smith', 'London');

INSERT INTO booking VALUES ('H111', 'G111', DATE'1999-01-01', DATE'1999-01-02', '1');

Update command

UPDATE room SET price = price*1.05;

 

CREATE TABLE booking_old

( hotel_no CHAR(4) NOT NULL,

  guest_no CHAR(4) NOT NULL,

  date_from DATETIME NOT NULL,

  date_to DATETIME NULL,

  room_no VARCHAR(4) NOT NULL);

 

INSERT INTO booking_old

(SELECT * FROM booking WHERE date_to < DATE‘2000-01-01');

 

Delete Command

 DELETE FROM booking WHERE date_to < DATE‘2000-01-01';

 

Answer the questions

1. List full details of all hotels.

2. List full details of all hotels in London.

3. List the names and addresses of all guests in London, alphabetically ordered by name.

 4. List all double or family rooms with a price below £40.00 per night, in ascending order of price.

5. List the bookings for which no date_to has been specified.

 

Practice Aggregate

1. How many hotels are there?

2. What is the average price of a room?

3. What is the total revenue per night from all double rooms?

4. How many different guests have made bookings for August?

 

Subqueries and Joins

1. List the price and type of all rooms at the Grosvenor Hotel.

2. List all guests currently staying at the Grosvenor Hotel.

3. List the details of all rooms at the Grosvenor Hotel, including the name of the guest staying in the room, if the room is occupied.

4. What is the total income from bookings for the Grosvenor Hotel today?

5. List the rooms that are currently unoccupied at the Grosvenor Hotel.

6. What is the lost income from unoccupied rooms at the Grosvenor Hotel?

 

Grouping

1. List the number of rooms in each hotel.

2. List the number of rooms in each hotel in London.

3. What is the average number of bookings for each hotel in August?

4. What is the most commonly booked room type for each hotel in London?

5. What is the lost income from unoccupied rooms at each hotel today?