Database - Data Modeling with ER Model - Discussion

Now, It's clear. Thanks @Jiten @Debanjan Dey.

Can someone explain it please?

Suppose Brad Pitt is an instance of a person. He may or may not be an employee or a student but a person indeed. So we choose the instance.

@Jiten.

Subtype will also correct. If PERSON is a generalized entity, then EMPLOYEE, STUDENT these are subtype entity.

How did you explain here? It seems the subtype and instance entity both is synonymous.

But, as we have both the option in the question, it caused the confusion.

Can someone elaborate the types of entities that are given in the question?

It might help to think of an entity as a thing.

So you are asking about a type of thing, and an actual instance of that thing.

For example, one type of thing is a Person. Brad Pitt is an instance of a Person. A Fruit is a type of thing, and an Apple is an instance of a Fruit.

Make sense?

In a database world you might name a table after the type of an entity, like a Car. However, each record in the table is an instance of a Car, like Ford Mustang.

What is an instance entity?

Can someone explain this answer?

Can somebody elaborate this answer ?