---
title: "What is BCNF (Boyce-Codd Normal Form)?"  
description: "What is BCNF (Boyce-Codd Normal Form)?"  
author: "Sumit Kesarwani"  
published: 2014-09-22  
updated: 2020-09-22  
canonical: https://www.mindstick.com/interview/2178/what-is-bcnf-boyce-codd-normal-form  
category: "database"  
tags: ["database"]  
reading_time: 1 minute  

---

# What is BCNF (Boyce-Codd Normal Form)?

A relation schema R is in BCNF if it is in 3NF and satisfies an additional constraint that for every FD X A, X must be a candidate key.

## Answers

### Answer by Sumit Kesarwani

A relation schema R is in BCNF if it is in 3NF and satisfies an additional constraint that for every FD X A, X must be a candidate key.


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Original Source: https://www.mindstick.com/interview/2178/what-is-bcnf-boyce-codd-normal-form

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