-onsider the following relations: DATABASE: HOTEL MANAGEMENT Hotel (hotelno, hotelName, city) Room (roomno, hotelno, type, price) Booking (hotelno, guestno, datefrom, dateTo, roomNo) Guest (guestNo, guestName, guestAddress) A) Analyze the following queries whether it is semantically correct or not. If it is incorrect, justify your answer. 1. SELECT r.type, r.price FROM Room r, Hotel h WHERE r.hotel_number = h.hotel_number AND h.hotel_name = 'Grosvenor Hotel' AND hotelNa ho telNo r.type > 100%3; 2. SELECT g.guestNo, g.name FROM Hotel h, Booking b, Guest g WHERE h.hotelNo = b.hotelNo AND h.hName = Grosvenor Hotel; B) Write the relational algebra operations for the following query: SELECT g.guestNo, g.guestName FROM Room r, Hotel h, Booking b, Guest g WHERE h.hotelNo = b.hotelNo AND g.guestNo = b.guestNo AND %3D h.hotelNo = r.hotelNo AND h.hotelName = 'Grosvenor Hotel' AND dateFrom >= '1-Jan-04' AND dateTo <= '31-Dec-04';
-onsider the following relations: DATABASE: HOTEL MANAGEMENT Hotel (hotelno, hotelName, city) Room (roomno, hotelno, type, price) Booking (hotelno, guestno, datefrom, dateTo, roomNo) Guest (guestNo, guestName, guestAddress) A) Analyze the following queries whether it is semantically correct or not. If it is incorrect, justify your answer. 1. SELECT r.type, r.price FROM Room r, Hotel h WHERE r.hotel_number = h.hotel_number AND h.hotel_name = 'Grosvenor Hotel' AND hotelNa ho telNo r.type > 100%3; 2. SELECT g.guestNo, g.name FROM Hotel h, Booking b, Guest g WHERE h.hotelNo = b.hotelNo AND h.hName = Grosvenor Hotel; B) Write the relational algebra operations for the following query: SELECT g.guestNo, g.guestName FROM Room r, Hotel h, Booking b, Guest g WHERE h.hotelNo = b.hotelNo AND g.guestNo = b.guestNo AND %3D h.hotelNo = r.hotelNo AND h.hotelName = 'Grosvenor Hotel' AND dateFrom >= '1-Jan-04' AND dateTo <= '31-Dec-04';
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Question
in database
Transcribed Image Text:: Consider the following relations:
[2
DATABASE: HOTEL MANAGEMENT
Hotel (hotelno, hotelName, city)
Room (roomno, hotelno, type, price)
Booking (hotelno, guestno, datefrom, dateTo, roomNo)
Guest (guestNo, guestName, guestAddress)
A) Analyze the following queries whether it is semantically correct or not. If it is incorrect,
justify your answer.
1. SELECT r.type, r.price
FROM Room r, Hotel h
WHERE r.hotel_number = h.hotel_number AND h.hotel_name = 'Grosvenor
Hotel AND
hotelya
ho telNo
r.type > 1003;
2. SELECT g.guestNo, g.name
FROM Hotel h, Booking b, Guest g
WHERE h.hotelNo = b.hotelNo AND h.hName = Grosvenor Hotel;
B) Write the relational algebra operations for the following query:
SELECT g.guestNo, g.guestName
FROM Room T, Hotel h, Booking b, Guest g
WHERE h.hotelNo = b.hotelNo AND g.guestNo = b.guestNo AND
%3D
h.hotelNo = r.hotelNo AND h.hotelName = 'Grosvenor Hotel' AND
dateFrom >= '1-Jan-04' AND dateTo <= '31-Dec-04';
Vou
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