Logical Database Design - Study Mode
[#26] A candidate key must uniquely identify each row.
Correct Answer
(A) True
[#27] Well-structured relations encourage anomalies of data.
Correct Answer
(B) False
[#28] A foreign key may be null and still adhere to the referential integrity constraint.
Correct Answer
(A) True
[#29] If a relation is in third normal form, it does not need to be in second normal form.
Correct Answer
(B) False
[#30] The primary key of the new relation in a many-to-many relationship is a composite key comprised of the primary keys of each of the binary entities.
Correct Answer
(A) True