Data
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You're reading from  The SQL Workshop

Product typeBook
Published inDec 2019
Reading LevelBeginner
PublisherPackt
ISBN-139781838642358
Edition1st Edition
Languages
SQL
Tools
SQL Server
Concepts
Databases
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Authors (3):
Frank Solomon
Frank Solomon
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Frank Solomon

Frank Solomon started out building front-end and database software with Microsoft stack tools such as SQL Server and ASP and then extended into ASP.NET, C#, VB.NET, JavaScript, and more. He learns about new products, languages, and technologies all the time, and he pushed into technical writing as a way to present and express his research and discoveries. He works as a contractor right now. He has worked in start-ups himself, and he knows that the hard work of writers and developers makes the end user experience easier.
Read more about Frank Solomon

Prashanth Jayaram
Prashanth Jayaram
author image
Prashanth Jayaram

Prashanth Jayaram is a database technologist, blogger, engineering lead, automation expert, TechNet wiki ninja, PowerShell Geek, and technologist enthusiast with extensive experience in designing database solutions. He is the author of PowerShell 6.0 Linux Administration Cookbook and has hands-on experience with the next generation database technologies. He has been awarded as ABOVE and BEYOND and Best SQL Author 2018 towards his contribution to SQL Server technology. He has articulated over 200+ articles widespread across SQL, NoSQL, PowerShell, Python, SQL on Linux, SQL on Azure, and SQL on AWS arenas.
Read more about Prashanth Jayaram

Awni Al Saqqa
Awni Al Saqqa
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Awni Al Saqqa

Awni Al Saqqa is a Microsoft Technology Specialist in MS SQL Server and a certified solutions developer since 2007. He has over a decade of experience with database development and administration on SQL Server, Oracle, and MySQL. He is a solutions architect, who is hands-on in many enterprise projects for different business sectors, such as education, hospitality, retail, manufacturing, marketing, and more, which has given him the perfect combination between business and technical experience.
Read more about Awni Al Saqqa

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Types of Data Integrity

Let's look at the different types of data integrity:

  • Entity integrity: This defines each row as unique within the table. No two rows can have the same name. To achieve this, a primary key can be defined. This field contains a unique identifier—no two rows can contain the same unique identifier.
  • Referential integrity: Referential integrity is about relationships. When two or more tables have a relationship, we must ensure that the value of the foreign key always matches the value of the primary key, otherwise the record is orphaned.

    Referential integrity prevents adding records to a related table if there is no associated record in the primary or parent table, changing values in a primary table that can result in orphaned records in a related table, and deleting records from a primary table if there are matching related records.

  • Domain integrity: This is primarily concerned with the validity of entries for a given column. It is important...
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The SQL Workshop
Published in: Dec 2019Publisher: PacktISBN-13: 9781838642358
© 2019 Packt Publishing Limited All Rights Reserved

Authors (3)

author image
Frank Solomon

Frank Solomon started out building front-end and database software with Microsoft stack tools such as SQL Server and ASP and then extended into ASP.NET, C#, VB.NET, JavaScript, and more. He learns about new products, languages, and technologies all the time, and he pushed into technical writing as a way to present and express his research and discoveries. He works as a contractor right now. He has worked in start-ups himself, and he knows that the hard work of writers and developers makes the end user experience easier.
Read more about Frank Solomon

author image
Prashanth Jayaram

Prashanth Jayaram is a database technologist, blogger, engineering lead, automation expert, TechNet wiki ninja, PowerShell Geek, and technologist enthusiast with extensive experience in designing database solutions. He is the author of PowerShell 6.0 Linux Administration Cookbook and has hands-on experience with the next generation database technologies. He has been awarded as ABOVE and BEYOND and Best SQL Author 2018 towards his contribution to SQL Server technology. He has articulated over 200+ articles widespread across SQL, NoSQL, PowerShell, Python, SQL on Linux, SQL on Azure, and SQL on AWS arenas.
Read more about Prashanth Jayaram

author image
Awni Al Saqqa

Awni Al Saqqa is a Microsoft Technology Specialist in MS SQL Server and a certified solutions developer since 2007. He has over a decade of experience with database development and administration on SQL Server, Oracle, and MySQL. He is a solutions architect, who is hands-on in many enterprise projects for different business sectors, such as education, hospitality, retail, manufacturing, marketing, and more, which has given him the perfect combination between business and technical experience.
Read more about Awni Al Saqqa

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