The domain of values of the new column added to the relation to represent the unary one-to-many relationship is the same as that of the relation's primary key.

Question

Quizplus · Accepted Answer

In a unary one-to-many relationship, each record in the relation can have multiple related records in the same relation. To represent this relationship, a new column is added to the relation that contains the primary key of each related record. The domain of values of this new column is the same as that of the relation's primary key. This ensures that the new column can only store values that correspond to valid primary key values in the relation. Therefore, the answer is A.

The Domain of Values of the New Column Added to the Relation