Surrogate primary key: A system assigned primary key in a relational database such as a serial number or any other which is not derived from any data in the database is known as surrogate primary key. It is deputy of the primary key and will act as a primary key in the database and does not have any other significance. To simplify the primary key structures in the database, surrogate primary keys are created, and this ensures unique identification process in a relation. This surrogate key value will never change in the database.

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Answer 1

Question

Chapter 2, Problem 2.16RQ

Program Plan Intro

Surrogate primary key:

A system assigned primary key in a relational database such as a serial number or any other which is not derived from any data in the database is known as surrogate primary key.

It is deputy of the primary key and will act as a primary key in the database and does not have any other significance.

To simplify the primary key structures in the database, surrogate primary keys are created, and this ensures unique identification process in a relation.

This surrogate key value will never change in the database.

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Answer 2

Question

Chapter 2, Problem 2.16RQ

Program Plan Intro

Surrogate primary key:

A system assigned primary key in a relational database such as a serial number or any other which is not derived from any data in the database is known as surrogate primary key.

It is deputy of the primary key and will act as a primary key in the database and does not have any other significance.

To simplify the primary key structures in the database, surrogate primary keys are created, and this ensures unique identification process in a relation.

This surrogate key value will never change in the database.

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Answer 3

Question

Chapter 2, Problem 2.16RQ

Program Plan Intro

Surrogate primary key:

A system assigned primary key in a relational database such as a serial number or any other which is not derived from any data in the database is known as surrogate primary key.

It is deputy of the primary key and will act as a primary key in the database and does not have any other significance.

To simplify the primary key structures in the database, surrogate primary keys are created, and this ensures unique identification process in a relation.

This surrogate key value will never change in the database.

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Answer 4

Question

Chapter 2, Problem 2.16RQ

Program Plan Intro

Surrogate primary key:

A system assigned primary key in a relational database such as a serial number or any other which is not derived from any data in the database is known as surrogate primary key.

It is deputy of the primary key and will act as a primary key in the database and does not have any other significance.

To simplify the primary key structures in the database, surrogate primary keys are created, and this ensures unique identification process in a relation.

This surrogate key value will never change in the database.

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Answer 5

Chapter 2, Problem 2.16RQ

Program Plan Intro

Surrogate primary key:

A system assigned primary key in a relational database such as a serial number or any other which is not derived from any data in the database is known as surrogate primary key.

It is deputy of the primary key and will act as a primary key in the database and does not have any other significance.

To simplify the primary key structures in the database, surrogate primary keys are created, and this ensures unique identification process in a relation.

This surrogate key value will never change in the database.

Answer 6

Chapter 2, Problem 2.16RQ

Program Plan Intro

Surrogate primary key:

A system assigned primary key in a relational database such as a serial number or any other which is not derived from any data in the database is known as surrogate primary key.

It is deputy of the primary key and will act as a primary key in the database and does not have any other significance.

To simplify the primary key structures in the database, surrogate primary keys are created, and this ensures unique identification process in a relation.

This surrogate key value will never change in the database.

Answer 7

Chapter 2, Problem 2.16RQ

Program Plan Intro

Surrogate primary key:

A system assigned primary key in a relational database such as a serial number or any other which is not derived from any data in the database is known as surrogate primary key.

It is deputy of the primary key and will act as a primary key in the database and does not have any other significance.

To simplify the primary key structures in the database, surrogate primary keys are created, and this ensures unique identification process in a relation.

This surrogate key value will never change in the database.

Answer 8

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Answer 9

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Answer 10

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Answer 11

Ch. 2 - Prob. 2.1RQ Ch. 2 - Define the term entity, and give an example of an...Ch. 2 - Prob. 2.3RQ Ch. 2 - Prob. 2.4RQ Ch. 2 - Prob. 2.5RQ Ch. 2 - Prob. 2.6RQ Ch. 2 - Prob. 2.7RQ Ch. 2 - Prob. 2.8RQ Ch. 2 - Prob. 2.9RQ Ch. 2 - Define the term unique key and give an example.

Solution Summary: The author explains how surrogate primary keys are assigned to a relational database to ensure unique identification.

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Chapter 2 Solutions