Chapter 2 Data Models
Exercise 1- Write the business rules for the following:
Buying a book at the book store
A student may purchased many books.
A book may be purchased by many customers.
A book should have: author, isbn, price, location and title.
2. What is data redundancy, and which characteristics of the file system can lead to it?
Data redundancy is when the same data is stored unnecessarily at different places. When
multiple people keep copies of the same database it can lead