Question

which is true about the primary key in an associative entity? a.) an associative entity has its primary key columns being all foreign keys. b.) an associative entity has a synthetic key. c.) an associative entity has an artificial primary key. d.) an associative entity has a natural primary key.

Answer 1

The primary key of a. an associative entity is a composite made up of all foreign keys from the entities it associates, forming a unique identifier for each combination of linked entities.

Step-by-step explanation:

The answer to the question regarding what is true about the primary key in an associative entity is an associative entity has its primary key columns being all foreign keys. An associative entity, often found in many-to-many relationships in entity-relationship diagrams, combines the primary keys of the two entities it connects to create a composite primary key for itself. Each part of this composite key is a foreign key that references a primary key in one of the connected entities. It is not uncommon for associative entities to contain additional attributes beyond the composite primary keys.