# Relational Completeness

The ability of a query language to express every operation of relational algebra.

## What is **Relational Completeness** in a relational database?

**Relational Completeness** — The ability of a query language to express every operation of relational algebra.

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

Updated: September 27, 2026

Source: https://www.ask-codey.com/glossary/relational-completeness