A candidate key of a relation that is not chosen to be the primary key ____.
A) is called a foreign key
B) is called an alternate key
C) is called a relationship key
D) does not have to have unique values
E) does not have to be wholly contained within the relation
Correct Answer:
Verified
Q1: The values of a candidate key of
Q3: In a relation _.
A) several rows can
Q4: The attribute(s) that make up a foreign
Q5: An attribute or combination of attributes that
Q6: The primary key of the relation added
Q7: All of the following are true about
Q8: The values of the primary key of
Q9: A foreign key _.
A) must have the
Q10: The relational data model was first described
Q11: In relational database, the basic data structure
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