# Lock

A concurrency-control claim restricting conflicting access to a database resource.

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

**Lock** — A concurrency-control claim restricting conflicting access to a database resource.

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

Updated: September 27, 2026

Source: https://www.ask-codey.com/glossary/lock