# ACID Compliance

Atomic, Consistent, Isolated, Durable

## What does **ACID Compliance** mean?

A database transaction is **ACID Compliant** when it is:

* **Atomic** - The All or Nothing principle - either it all completes or none of it does (it rolls back) 
* **Consistent** - All statements run at the same time so that they operate on the same state of the data
* **Isolated** - Changes to the data are not visible outside of the transaction - until the transaction is committed
* **Durable** - Once the transaction is complete, the changes are permanent

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/acid-compliance