Question

Which relation is created by placing the primary key of the entity on the one side of the relationship as a foreign key in the relation for the entity on the many side?

A) Associative entity
B) Weak entity
C) Binary 1:N relationship
D) Associative entity with additional key

Answer 1

The relation created by placing the primary key of the entity on the one side of the relationship as a foreign key in the relation for the entity on the many side is called a Binary 1:N relationship.

Step-by-step explanation:

The relation created by placing the primary key of the entity on the one side of the relationship as a foreign key in the relation for the entity on the many side is called a Binary 1:N relationship.

In a binary 1:N relationship, one entity has a primary key that is referenced as a foreign key in multiple rows of another entity's relation. This represents a one-to-many relationship between the two entities.

For example, consider a database with two entities: 'Customers' and 'Orders'. Each customer can have multiple orders, and the primary key of the 'Customers' entity (e.g., customer_id) would be used as a foreign key in the 'Orders' relation to represent this relationship.