Author Question: For a binary many-to-many relationship existing between entity types A and B: A) a separate ... (Read 78 times)

sabina · **on:** Jul 7, 2018

For a binary many-to-many relationship existing between entity types A and B:

A) a separate relation C is created; the primary key of relation C is a composite key consisting of the primary key for each of the two entities in the relationship.
B) the primary keys of relation A and relation B become foreign keys in a new relation C.
C) secondary keys are used to establish the relationship.
D) place the primary key of either entity in the relation for the other entity or do this for both entities.
E) Entity A and B are merged into one.

Question 2

A business with a differentiation strategy will add cost to an activity as long as the activity has a positive margin.

Indicate whether the statement is true or false

Kingjoffery · **Reply #1 on:** Jul 7, 2018

Answer to Question 1

A
Explanation: A) Relational databases do not allow for many-to-many relationships. Because of this, an association relation must be created.
CL

Answer to Question 2

TRUE