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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Chapter 7, Problem 3RQ

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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Answer 2

Question

Chapter 7, Problem 3RQ

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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Answer 3

Question

Chapter 7, Problem 3RQ

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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Answer 4

Question

Chapter 7, Problem 3RQ

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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Answer 5

Chapter 7, Problem 3RQ

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 6

Chapter 7, Problem 3RQ

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 7

Chapter 7, Problem 3RQ

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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Answer 11

Ch. 7 - Prob. 1RQ Ch. 7 - Explain why the following command would create an...Ch. 7 - Prob. 3RQ Ch. 7 - Explain why it might be more appropriate to...Ch. 7 - What is the difference between a column constraint...Ch. 7 - What are referential constraint actions?Ch. 7 - Rewrite the following WHERE clause without the use...Ch. 7 - Explain the difference between an ORDER BY clause...Ch. 7 - Explain why the following two commands produce...Ch. 7 - What is the difference between the COUNT aggregate...

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