# Natural Key

A key formed from meaningful values that already belong to the modeled domain.

## What is **Natural Key** in a relational database?

**Natural Key** — A key formed from meaningful values that already belong to the modeled 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/natural-key