# First Normal Form (1NF)

The normal form requiring each attribute value to be a single value from its domain.

## What is **First Normal Form (1NF)** in a relational database?

**First Normal Form (1NF)** — The normal form requiring each attribute value to be a single value from its domain.

Level: Journeyman · [More Database terms at this level](https://www.ask-codey.com/glossary/subjects/database/journeyman)

Updated: September 27, 2026

Source: https://www.ask-codey.com/glossary/first-normal-form-1nf