Chapter 4 Review Questions
4.1. How do the relations (tables) in SQL differ from the relations defined formally in Chapter 3?
Discuss the other differences in terminology. Why does SQL allow duplicate tuples in a table or
in a query result?
Chapter 1 Review Questions
Data- the quantities, characters, or symbols on which operations are performed by a computer,
being stored and transmitted in the form of electrical signals and recorded on magnetic, optical,
or mechanical recording media.
Chapter 2 Review Questions
Data Model-define how data is connected to each other and how they are processed and stored
inside the system.
Database Schema- is the skeleton structure that represents the logical view of the entire
database. It defines how th