Database Concepts (7th Edition)
Database Concepts (7th Edition)
7th Edition
ISBN: 9780133544626
Author: David M. Kroenke, David J. Auer
Publisher: PEARSON
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Chapter 2, Problem 2.20RQ

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Referential integrity:

  • Referential integrity is supported by Relational Database Management System (RDBMS).
  • It created by aggregating foreign and primary keys.
  • Relational database is basically a collection of tables where every table has a specific key assigned to it, which is known as a primary key.
    • In relational databases, a primary key is a key that is used for uniquely identifying and defining the characteristics of each row.
  • The values in each row of a table are unique. Two tables are related to each other with the help of a foreign key.
    • A primary key attribute in one table is the foreign key for another table. In a logical way, a foreign key is used to establish a relationship between two tables.
  • If the record in the referenced table is deleted then, all the records related to that referenced record will be deleted.

Example:

  • It gives assurance for one value in an entity which is a foreign key attribute and will not get lost or disassociated from the parent entity...

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