Integrity constraints: The limitations in the relational data model which is used to maintain the data’s accuracy and maintain its integrity is termed as integrity constraints. In SQL CREATE TABLE commands, the types of integrity constraints enforced when a primary key is declared are: Entity integrity Referential integrity Primary key: Primary key is used to identify the unique record from a collection of records. To identify each record in a table, at least there must be one data field which should be unique. That is, corresponding data field of every record should be unique. It is called a primary key. To relate two tables, a primary key field in one table is added to the related table, and it is called foreign key.

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Answer 1

Question

Chapter 8, Problem 1RQ

Program Plan Intro

Integrity constraints:

The limitations in the relational data model which is used to maintain the data’s accuracy and maintain its integrity is termed as integrity constraints.

In SQL CREATE TABLE commands, the types of integrity constraints enforced when a primary key is declared are:

Entity integrity

Referential integrity

Primary key:

Primary key is used to identify the unique record from a collection of records.

To identify each record in a table, at least there must be one data field which should be unique. That is, corresponding data field of every record should be unique. It is called a primary key.

To relate two tables, a primary key field in one table is added to the related table, and it is called foreign key.

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Explanation of Solution

Entity integrity:

When creating a table, the primary key in the table must be assured and the attributes in the table should not be null.
The values added in the attribute should be valid.
Hence, NOT NULL and PRIMARY KEY clause in the SQL CREATE TABLE command enforces entity integrity.

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Answer 2

Question

Chapter 8, Problem 1RQ

Program Plan Intro

Integrity constraints:

The limitations in the relational data model which is used to maintain the data’s accuracy and maintain its integrity is termed as integrity constraints.

In SQL CREATE TABLE commands, the types of integrity constraints enforced when a primary key is declared are:

Entity integrity

Referential integrity

Primary key:

Primary key is used to identify the unique record from a collection of records.

To identify each record in a table, at least there must be one data field which should be unique. That is, corresponding data field of every record should be unique. It is called a primary key.

To relate two tables, a primary key field in one table is added to the related table, and it is called foreign key.

Expert Solution & Answer

Explanation of Solution

Entity integrity:

When creating a table, the primary key in the table must be assured and the attributes in the table should not be null.
The values added in the attribute should be valid.
Hence, NOT NULL and PRIMARY KEY clause in the SQL CREATE TABLE command enforces entity integrity.

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Answer 3

Question

Chapter 8, Problem 1RQ

Program Plan Intro

Integrity constraints:

The limitations in the relational data model which is used to maintain the data’s accuracy and maintain its integrity is termed as integrity constraints.

In SQL CREATE TABLE commands, the types of integrity constraints enforced when a primary key is declared are:

Entity integrity

Referential integrity

Primary key:

Primary key is used to identify the unique record from a collection of records.

To identify each record in a table, at least there must be one data field which should be unique. That is, corresponding data field of every record should be unique. It is called a primary key.

To relate two tables, a primary key field in one table is added to the related table, and it is called foreign key.

Expert Solution & Answer

Explanation of Solution

Entity integrity:

When creating a table, the primary key in the table must be assured and the attributes in the table should not be null.
The values added in the attribute should be valid.
Hence, NOT NULL and PRIMARY KEY clause in the SQL CREATE TABLE command enforces entity integrity.

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Answer 4

Question

Chapter 8, Problem 1RQ

Program Plan Intro

Integrity constraints:

The limitations in the relational data model which is used to maintain the data’s accuracy and maintain its integrity is termed as integrity constraints.

In SQL CREATE TABLE commands, the types of integrity constraints enforced when a primary key is declared are:

Entity integrity

Referential integrity

Primary key:

Primary key is used to identify the unique record from a collection of records.

To identify each record in a table, at least there must be one data field which should be unique. That is, corresponding data field of every record should be unique. It is called a primary key.

To relate two tables, a primary key field in one table is added to the related table, and it is called foreign key.

Expert Solution & Answer

Explanation of Solution

Entity integrity:

When creating a table, the primary key in the table must be assured and the attributes in the table should not be null.
The values added in the attribute should be valid.
Hence, NOT NULL and PRIMARY KEY clause in the SQL CREATE TABLE command enforces entity integrity.

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Answer 5

Chapter 8, Problem 1RQ

Program Plan Intro

Integrity constraints:

The limitations in the relational data model which is used to maintain the data’s accuracy and maintain its integrity is termed as integrity constraints.

In SQL CREATE TABLE commands, the types of integrity constraints enforced when a primary key is declared are:

Entity integrity

Referential integrity

Primary key:

Primary key is used to identify the unique record from a collection of records.

To identify each record in a table, at least there must be one data field which should be unique. That is, corresponding data field of every record should be unique. It is called a primary key.

To relate two tables, a primary key field in one table is added to the related table, and it is called foreign key.

Expert Solution & Answer

Explanation of Solution

Entity integrity:

When creating a table, the primary key in the table must be assured and the attributes in the table should not be null.
The values added in the attribute should be valid.
Hence, NOT NULL and PRIMARY KEY clause in the SQL CREATE TABLE command enforces entity integrity.

Answer 6

Chapter 8, Problem 1RQ

Program Plan Intro

Integrity constraints:

The limitations in the relational data model which is used to maintain the data’s accuracy and maintain its integrity is termed as integrity constraints.

In SQL CREATE TABLE commands, the types of integrity constraints enforced when a primary key is declared are:

Entity integrity

Referential integrity

Primary key:

Primary key is used to identify the unique record from a collection of records.

To identify each record in a table, at least there must be one data field which should be unique. That is, corresponding data field of every record should be unique. It is called a primary key.

To relate two tables, a primary key field in one table is added to the related table, and it is called foreign key.

Expert Solution & Answer

Explanation of Solution

Entity integrity:

When creating a table, the primary key in the table must be assured and the attributes in the table should not be null.
The values added in the attribute should be valid.
Hence, NOT NULL and PRIMARY KEY clause in the SQL CREATE TABLE command enforces entity integrity.

Answer 7

Chapter 8, Problem 1RQ

Program Plan Intro

Integrity constraints:

The limitations in the relational data model which is used to maintain the data’s accuracy and maintain its integrity is termed as integrity constraints.

In SQL CREATE TABLE commands, the types of integrity constraints enforced when a primary key is declared are:

Entity integrity

Referential integrity

Primary key:

Primary key is used to identify the unique record from a collection of records.

To identify each record in a table, at least there must be one data field which should be unique. That is, corresponding data field of every record should be unique. It is called a primary key.

To relate two tables, a primary key field in one table is added to the related table, and it is called foreign key.

Answer 8

Expert Solution & Answer

Explanation of Solution

Entity integrity:

When creating a table, the primary key in the table must be assured and the attributes in the table should not be null.
The values added in the attribute should be valid.
Hence, NOT NULL and PRIMARY KEY clause in the SQL CREATE TABLE command enforces entity integrity.

Answer 9

Expert Solution & Answer

Answer 10

Expert Solution & Answer

Answer 11

Ch. 8 - Prob. 1RQ Ch. 8 - Explain why it might be more appropriate to...Ch. 8 - What is the difference between a column constraint...Ch. 8 - What are referential constraint actions?Ch. 8 - What is the purpose of a CHECK constraint?Ch. 8 - Explain when an ALTER TABLE command might be...Ch. 8 - What is the difference between an INSERT command...Ch. 8 - What is the difference between using a subquery...Ch. 8 - What is the difference between a view and a...Ch. 8 - Prob. 10RQ

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Chapter 8 Solutions