1. List the characteristics that a table must have to be considered a relation.
2. List two synonyms for file, two for record, and two for field.
3. What are the four uses of a primary key?
4. What are the desirable characteristics of a primary key?
5. What is a surrogate key and when do you use them?
6. What is a foreign key?
7. What is referential integrity and why is it important?
8. What are the three possible interpretations of a null value?
9. What is normalization? Why is it important?