The values of a candidate key of a relation ____.
A) cannot be unique
B) may be unique or non-unique
C) must be unique
D) must consist of a single attribute
E) None of the above.
Correct Answer:
Verified
Q2: A candidate key of a relation that
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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