# Superkey

Any attribute set that uniquely identifies every tuple, including sets with unnecessary attributes.

## What is **Superkey** in a relational database?

**Superkey** — Any attribute set that uniquely identifies every tuple, including sets with unnecessary attributes.

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/superkey