Review Questions
1
.
State the three reasons why keys are important.
2
.
What are the four main types of
keys?
3
.
What is the purpose of a
candidate key?
4
.
State four items of the Elements of a Candidate Key.
5
.
True or False: A candidate key can be composed of more than one field.
6
.
Can a table have more than one candidate key?
7
.
What is an
artificial candidate key?
8
.
What is the most important key you assign to a table?
9
.
Why is this key important?
10
.
How do you establish a
primary key?
12
.
What must you do before you finalize your selection of a primary key?
13
.
What is an
alternate key?
14
.
What do you ensure by establishing table-level integrity?
15
.
Why should you review the initial table structures?
