Question

Consider the following relationship involving two entities, students and classes:A student can take many classes. A class can be taken by many students.

How many tables can be used to represent this relationship in a schema?

A. 1

B. 2

C. 3.

D all of them

Answer 1

Answer:

3

Explanation:

ER model can be used and is based on three basic concepts: Entities, Attributes & Relationships.

An entity can be place, person, object, event or a concept, which stores data in the database.

Relationship is nothing but an association among two or more entities. A weak entity is a type of entity which doesn't have its key attribute.