Multiple Choice
The entity integrity rule states that:
A) no primary key attribute can be null.
B) referential integrity must be maintained across all entities.
C) each entity must have a primary key.
D) a primary key must have only one attribute.
Correct Answer:
Verified
Correct Answer:
Verified
Related Questions
Q70: Sample data are useful for developing prototype
Q71: A partial functional dependency is a functional
Q72: A functional dependency between two or more
Q73: A well-structured relation contains minimal redundancy and
Q74: A relation that contains no multivalued attributes
Q76: In the figure below, what type of
Q77: When a regular entity type contains a
Q78: Which of the following is NOT a
Q79: Which of the following violates the atomic
Q80: _ problems are encountered when removing data