Primary Key: A primary key is a special column of a relation used for uniquely identifying a relation. The primary key can be one column or combination of columns. The primary key will uniquely identify all the records of a table. The features of a primary are: The primary key contains a unique value for each row of data. The primary key column cannot contain null values.

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Answer 1

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Chapter 2, Problem 4PE

Program Plan Intro

Primary Key:

A primary key is a special column of a relation used for uniquely identifying a relation.

The primary key can be one column or combination of columns. The primary key will uniquely identify all the records of a table.

The features of a primary are:

The primary key contains a unique value for each row of data.

The primary key column cannot contain null values.

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Answer 2

Question

Chapter 2, Problem 4PE

Program Plan Intro

Primary Key:

A primary key is a special column of a relation used for uniquely identifying a relation.

The primary key can be one column or combination of columns. The primary key will uniquely identify all the records of a table.

The features of a primary are:

The primary key contains a unique value for each row of data.

The primary key column cannot contain null values.

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Answer 3

Question

Chapter 2, Problem 4PE

Program Plan Intro

Primary Key:

A primary key is a special column of a relation used for uniquely identifying a relation.

The primary key can be one column or combination of columns. The primary key will uniquely identify all the records of a table.

The features of a primary are:

The primary key contains a unique value for each row of data.

The primary key column cannot contain null values.

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Answer 4

Question

Chapter 2, Problem 4PE

Program Plan Intro

Primary Key:

A primary key is a special column of a relation used for uniquely identifying a relation.

The primary key can be one column or combination of columns. The primary key will uniquely identify all the records of a table.

The features of a primary are:

The primary key contains a unique value for each row of data.

The primary key column cannot contain null values.

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Answer 5

Chapter 2, Problem 4PE

Program Plan Intro

Primary Key:

A primary key is a special column of a relation used for uniquely identifying a relation.

The primary key can be one column or combination of columns. The primary key will uniquely identify all the records of a table.

The features of a primary are:

The primary key contains a unique value for each row of data.

The primary key column cannot contain null values.

Answer 6

Chapter 2, Problem 4PE

Program Plan Intro

Primary Key:

A primary key is a special column of a relation used for uniquely identifying a relation.

The primary key can be one column or combination of columns. The primary key will uniquely identify all the records of a table.

The features of a primary are:

The primary key contains a unique value for each row of data.

The primary key column cannot contain null values.

Answer 7

Chapter 2, Problem 4PE

Program Plan Intro

Primary Key:

A primary key is a special column of a relation used for uniquely identifying a relation.

The primary key can be one column or combination of columns. The primary key will uniquely identify all the records of a table.

The features of a primary are:

The primary key contains a unique value for each row of data.

The primary key column cannot contain null values.

Answer 8

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Answer 9

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Answer 10

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Answer 11

Ch. 2 - Prob. 1PE Ch. 2 - Prob. 2PE Ch. 2 - Prob. 3PE Ch. 2 - Prob. 4PE Ch. 2 - Prob. 5PE Ch. 2 - Prob. 6PE Ch. 2 - Prob. 7PE Ch. 2 - Prob. 8PE Ch. 2 - Prob. 9PE Ch. 2 - Describe the differences in meaning between the...

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Chapter 2 Solutions