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What is the role of a foreign key in a relational database?

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Question: What is the role of a foreign key in a relational database?

Options:

  1. To uniquely identify a record
  2. To establish a relationship between two tables
  3. To enforce data integrity
  4. To improve query performance

Correct Answer: To establish a relationship between two tables

Solution: 

A foreign key is used to establish a relationship between two tables by referencing the primary key of another table.

What is the role of a foreign key in a relational database?

Practice Questions

Q1
What is the role of a foreign key in a relational database?
  1. To uniquely identify a record
  2. To establish a relationship between two tables
  3. To enforce data integrity
  4. To improve query performance

Questions & Step-by-Step Solutions

What is the role of a foreign key in a relational database?
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