Justification: Consider a relation generated from a many-to-one relationship that having primary key and foreign key constraints. In the above diagram, “sec_ID”, “semester”, and “year” are the primary key in the “Section” entity. The “Course” entity contains “course_ID”, “title”, and “credit” attributes. The “course_ID” is the primary key. So, they are together and become a primary key for “sec_course” relation...

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Chapter 6, Problem 8PE

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Justification:

Consider a relation generated from a many-to-one relationship that having primary key and foreign key constraints.

In the above diagram, “sec_ID”, “semester”, and “year” are the primary key in the “Section” entity.

The “Course” entity contains “course_ID”, “title”, and “credit” attributes. The “course_ID” is the primary key.

So, they are together and become a primary key for “sec_course” relation...

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Chapter 6, Problem 8PE

Explanation of Solution

Justification:

Consider a relation generated from a many-to-one relationship that having primary key and foreign key constraints.

In the above diagram, “sec_ID”, “semester”, and “year” are the primary key in the “Section” entity.

The “Course” entity contains “course_ID”, “title”, and “credit” attributes. The “course_ID” is the primary key.

So, they are together and become a primary key for “sec_course” relation...

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Check out a sample textbook solution

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Answer 3

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Chapter 6, Problem 8PE

Explanation of Solution

Justification:

Consider a relation generated from a many-to-one relationship that having primary key and foreign key constraints.

In the above diagram, “sec_ID”, “semester”, and “year” are the primary key in the “Section” entity.

The “Course” entity contains “course_ID”, “title”, and “credit” attributes. The “course_ID” is the primary key.

So, they are together and become a primary key for “sec_course” relation...

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Check out a sample textbook solution

See solution

Answer 4

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Chapter 6, Problem 8PE

Explanation of Solution

Justification:

Consider a relation generated from a many-to-one relationship that having primary key and foreign key constraints.

In the above diagram, “sec_ID”, “semester”, and “year” are the primary key in the “Section” entity.

The “Course” entity contains “course_ID”, “title”, and “credit” attributes. The “course_ID” is the primary key.

So, they are together and become a primary key for “sec_course” relation...

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Check out a sample textbook solution

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Answer 6

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Answer 7

Chapter 6, Problem 8PE

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Justification:

Consider a relation generated from a many-to-one relationship that having primary key and foreign key constraints.

In the above diagram, “sec_ID”, “semester”, and “year” are the primary key in the “Section” entity.

The “Course” entity contains “course_ID”, “title”, and “credit” attributes. The “course_ID” is the primary key.

So, they are together and become a primary key for “sec_course” relation...

Answer 8

Chapter 6, Problem 8PE

Explanation of Solution

Justification:

Consider a relation generated from a many-to-one relationship that having primary key and foreign key constraints.

In the above diagram, “sec_ID”, “semester”, and “year” are the primary key in the “Section” entity.

The “Course” entity contains “course_ID”, “title”, and “credit” attributes. The “course_ID” is the primary key.

So, they are together and become a primary key for “sec_course” relation...

Answer 9

Chapter 6, Problem 8PE

Explanation of Solution

Justification:

Consider a relation generated from a many-to-one relationship that having primary key and foreign key constraints.

In the above diagram, “sec_ID”, “semester”, and “year” are the primary key in the “Section” entity.

The “Course” entity contains “course_ID”, “title”, and “credit” attributes. The “course_ID” is the primary key.

So, they are together and become a primary key for “sec_course” relation...

Answer 10

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Answer 12

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Answer 13

Ch. 6 - Prob. 1PE Ch. 6 - Consider a database that includes the entity sets...Ch. 6 - Design an E-R diagram for keeping track of the...Ch. 6 - Prob. 4PE Ch. 6 - Prob. 5PE Ch. 6 - Prob. 6PE Ch. 6 - Prob. 7PE Ch. 6 - Consider a relation such as sec_course, generated...Ch. 6 - Suppose the advisor relationship set were...Ch. 6 - Prob. 10PE

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