Discussion
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.
Answer: A
Correct answer: True
The associative relation’s primary key is the two foreign keys taken together, since a pairing is identified by which two rows it joins. Where the same pair may recur - the same student enrolling on the same course twice - a further attribute such as a date must be added to keep the key unique.
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