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,
where Hotel contains hotel details and hotelNo is the primary key ; Room contains
room details for each hotel and (roomNo, hoteINo) forms the primary key ; Booking
contains details of bookings and (hoteINo, guestNo, datFrom) forms the primary key;
Guest contains guest details and guestNo is the primary key
a. Identify the foreign keys in this schema. Explain how the entity and referential
integrity rules apply to these relations.
b. Produce some sample tables for these relations that observe the relational
integrity rules. Suggest some general constraints that would be appropriate for
c. Analyze the RDBMSs that you are currently using. Determine the support the
system provides for primary keys, alternate keys, foreign keys, relational
integrity, and views.
d. Implement the above schema in one of the RDBMSs you currently use.
Generate two user-views that are accessible and updatable as well as two
other user-views that cannot be updated.
Exercise 2 :
Assume you have been contracted to develop a database system for a university
library. You are required to use a systems development lifecycle approach. Discuss
how you are going to approach the project. Describe user groups that will be involved
during the requirement analysis. What are the key issues that need to be answered
during fact finding?
Exercise 3 :
Create an ER model for each of the following descriptions:
a. A large organization has several parking lots, which are used by staff.
b. Each parking lot has a unique name, location, capacity, and number of floors
c. Each parking lot has parking spaces, which are uniquely identified using a
d. Members of staff can request the sole use of a single parking space. Each
member of staff has a unique number, name, telephone extension number,
and vehicle license number.
e. Represent all the ER models described in parts (a), (b), (c), and (d) as a single
ER model. Provide any assumptions necessary to support your mode.
Delivering a high-quality product at a reasonable price is not enough anymore.
That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.
You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.Read more
Each paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.Read more
Thanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.Read more
Your email is safe, as we store it according to international data protection rules. Your bank details are secure, as we use only reliable payment systems.Read more
By sending us your money, you buy the service we provide. Check out our terms and conditions if you prefer business talks to be laid out in official language.Read more