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QWhat is the purpose of the FOREIGN KEY constraint in MySQL?

ID: #15422 Introduction to MySQL Databases 102 views
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#15422Q ID
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Introduction to MySQL DatabasesTopic
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  • A To enforce data integrity rules ✔ ✖
  • B To define the primary key of a table ✔ ✖
  • C To create an index for faster data retrieval ✔ ✖
  • D To specify default values for columns ✔ ✖
Correct Answer: Option A

Explanation

The FOREIGN KEY constraint in MySQL is used to establish a relationship between two tables based on a column or a combination of columns. It ensures that the values in the foreign key column(s) match the values in the referenced table's primary key column(s).

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