Entity: In ER model, the term “entity” refers to the actual entity set. It is represented by a rectangle box which contains the entity name. There is no any difference among various types of entities such as a weak entity and a composite entity. But Crows Foot use different relation types as strong or weak. A composite entity is stated that one or more PK attributes is also a Foreign Key (FK).

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Answer 1

Question

Chapter 4, Problem 11RQ

Program Plan Intro

Entity:

In ER model, the term “entity” refers to the actual entity set. It is represented by a rectangle box which contains the entity name.

There is no any difference among various types of entities such as a weak entity and a composite entity. But Crows Foot use different relation types as strong or weak.

A composite entity is stated that one or more PK attributes is also a Foreign Key (FK).

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Answer 2

Question

Chapter 4, Problem 11RQ

Program Plan Intro

Entity:

In ER model, the term “entity” refers to the actual entity set. It is represented by a rectangle box which contains the entity name.

There is no any difference among various types of entities such as a weak entity and a composite entity. But Crows Foot use different relation types as strong or weak.

A composite entity is stated that one or more PK attributes is also a Foreign Key (FK).

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Answer 3

Question

Chapter 4, Problem 11RQ

Program Plan Intro

Entity:

In ER model, the term “entity” refers to the actual entity set. It is represented by a rectangle box which contains the entity name.

There is no any difference among various types of entities such as a weak entity and a composite entity. But Crows Foot use different relation types as strong or weak.

A composite entity is stated that one or more PK attributes is also a Foreign Key (FK).

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Answer 4

Question

Chapter 4, Problem 11RQ

Program Plan Intro

Entity:

In ER model, the term “entity” refers to the actual entity set. It is represented by a rectangle box which contains the entity name.

There is no any difference among various types of entities such as a weak entity and a composite entity. But Crows Foot use different relation types as strong or weak.

A composite entity is stated that one or more PK attributes is also a Foreign Key (FK).

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Answer 5

Chapter 4, Problem 11RQ

Program Plan Intro

Entity:

In ER model, the term “entity” refers to the actual entity set. It is represented by a rectangle box which contains the entity name.

There is no any difference among various types of entities such as a weak entity and a composite entity. But Crows Foot use different relation types as strong or weak.

A composite entity is stated that one or more PK attributes is also a Foreign Key (FK).

Answer 6

Chapter 4, Problem 11RQ

Program Plan Intro

Entity:

In ER model, the term “entity” refers to the actual entity set. It is represented by a rectangle box which contains the entity name.

There is no any difference among various types of entities such as a weak entity and a composite entity. But Crows Foot use different relation types as strong or weak.

A composite entity is stated that one or more PK attributes is also a Foreign Key (FK).

Answer 7

Chapter 4, Problem 11RQ

Program Plan Intro

Entity:

In ER model, the term “entity” refers to the actual entity set. It is represented by a rectangle box which contains the entity name.

There is no any difference among various types of entities such as a weak entity and a composite entity. But Crows Foot use different relation types as strong or weak.

A composite entity is stated that one or more PK attributes is also a Foreign Key (FK).

Answer 8

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Answer 9

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Answer 11

Ch. 4 - Prob. 1RQ Ch. 4 - What is a strong (or identifying) relationship,...Ch. 4 - Prob. 4RQ Ch. 4 - Suppose you are working within the framework of...Ch. 4 - Prob. 6RQ Ch. 4 - Prob. 7RQ Ch. 4 - Discuss the difference between a composite key and...Ch. 4 - What two courses of action are available to a...Ch. 4 - Prob. 11RQ Ch. 4 - Discuss two ways in which the 1:M relationship...

Solution Summary: The author illustrates how Crow's Foot uses different relation types as strong or weak. A strong relationship may exist when a weak entity is associated to its parent entity.

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Chapter 4 Solutions