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What is the purpose of a foreign key in a database?

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

Options:

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

Correct Answer: To establish a link between two tables

Solution: 

A foreign key is used to establish a link between two tables in a database.

What is the purpose of a foreign key in a database?

Practice Questions

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

Questions & Step-by-Step Solutions

What is the purpose of a foreign key in a database?
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