Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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How does the foreign key contribute to the security of a database? Do you want to do this for a certain reason?

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Step 1

Foreign key:

A relational database foreign key links data from two relations.

It links two relations by referencing their principal keys.

Foreign Key Benefits:

 A foreign key must always relate to a main key, even if it exists alone.

Parent table = main key table.

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