Composite primary key: In the table more than one column is used to specify the primary key is called as composite primary key or composite key. In this case, all foreign keys should also require including all the columns. Composite primary key contains different datatypes.

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Chapter 5, Problem 13RQ

Program Plan Intro

Composite primary key:

In the table more than one column is used to specify the primary key is called as composite primary key or composite key.

In this case, all foreign keys should also require including all the columns.

Composite primary key contains different datatypes.

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Question

Chapter 5, Problem 13RQ

Program Plan Intro

Composite primary key:

In the table more than one column is used to specify the primary key is called as composite primary key or composite key.

In this case, all foreign keys should also require including all the columns.

Composite primary key contains different datatypes.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Answer 3

Question

Chapter 5, Problem 13RQ

Program Plan Intro

Composite primary key:

In the table more than one column is used to specify the primary key is called as composite primary key or composite key.

In this case, all foreign keys should also require including all the columns.

Composite primary key contains different datatypes.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Answer 4

Question

Chapter 5, Problem 13RQ

Program Plan Intro

Composite primary key:

In the table more than one column is used to specify the primary key is called as composite primary key or composite key.

In this case, all foreign keys should also require including all the columns.

Composite primary key contains different datatypes.

Expert Solution & Answer

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Check out a sample textbook solution

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Answer 5

Chapter 5, Problem 13RQ

Program Plan Intro

Composite primary key:

In the table more than one column is used to specify the primary key is called as composite primary key or composite key.

In this case, all foreign keys should also require including all the columns.

Composite primary key contains different datatypes.

Answer 6

Chapter 5, Problem 13RQ

Program Plan Intro

Composite primary key:

In the table more than one column is used to specify the primary key is called as composite primary key or composite key.

In this case, all foreign keys should also require including all the columns.

Composite primary key contains different datatypes.

Answer 7

Chapter 5, Problem 13RQ

Program Plan Intro

Composite primary key:

In the table more than one column is used to specify the primary key is called as composite primary key or composite key.

In this case, all foreign keys should also require including all the columns.

Composite primary key contains different datatypes.

Answer 8

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Answer 9

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Answer 10

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Answer 11

Ch. 5 - Prob. 1RQ Ch. 5 - What kinds of data would you store in an entity...Ch. 5 - Prob. 3RQ Ch. 5 - What is a subtype discriminator? Give an example...Ch. 5 - Prob. 5RQ Ch. 5 - What is a disjoint subtype? Give an example.Ch. 5 - What is the difference between partial...Ch. 5 - Prob. 8RQ Ch. 5 - According to the data model, is it required that...Ch. 5 - Prob. 10RQ

Composite primary key: In the table more than one column is used to specify the primary key is called as composite primary key or composite key. In this case, all foreign keys should also require including all the columns. Composite primary key contains different datatypes.

Solution Summary: The author explains that composite primary keys are useful in two circumstances. The identifiers are in composite entities, which means every primary key combination is allowed only once in the many-to-many relationship.

Concept explainers

Composite primary key:

In the table more than one column is used to specify the primary key is called as composite primary key or composite key.

In this case, all foreign keys should also require including all the columns.

Composite primary key contains different datatypes.

Want to see the full answer?

Chapter 5 Solutions