The following tables form part of a database held in a relational DBMS: Hotel (hotelNo, hotelName, city) Room (roomNo, hotelNo, type, price) Booking (hotelNo, guestNo, dateFrom, dateTo, roomNo) Guest (guestNo, guestName, guestAddress) where Hotel contains hotel details and hotelNo is the primary key; Room contains room details for each hotel and (roomNo, hotelNo) forms the primary key; Booking contains details of bookings and (hotelNo, guestNo, dateFrom) forms the primary key Guest contains guest details and guestNo is the primary key. Identify the foreign keys in this schema. Explain how the entity and referential integrity rules apply to these relations.
The following tables form part of a database held in a relational DBMS: Hotel (hotelNo, hotelName, city) Room (roomNo, hotelNo, type, price) Booking (hotelNo, guestNo, dateFrom, dateTo, roomNo) Guest (guestNo, guestName, guestAddress) where Hotel contains hotel details and hotelNo is the primary key; Room contains room details for each hotel and (roomNo, hotelNo) forms the primary key; Booking contains details of bookings and (hotelNo, guestNo, dateFrom) forms the primary key Guest contains guest details and guestNo is the primary key. Identify the foreign keys in this schema. Explain how the entity and referential integrity rules apply to these relations.
Chapter2: Database Design Fundamentals
Section: Chapter Questions
Problem 3TD
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The following tables form part of a
- Hotel (hotelNo, hotelName, city)
- Room (roomNo, hotelNo, type, price)
- Booking (hotelNo, guestNo, dateFrom, dateTo, roomNo)
- Guest (guestNo, guestName, guestAddress)
where
- Hotel contains hotel details and hotelNo is the primary key;
- Room contains room details for each hotel and (roomNo, hotelNo) forms the primary key;
- Booking contains details of bookings and (hotelNo, guestNo, dateFrom) forms the primary key
- Guest contains guest details and guestNo is the primary key.
- Identify the foreign keys in this schema. Explain how the entity and referential integrity rules apply to these relations.
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