# Non-Repeatable Read

Getting a different value when rereading a row changed and committed by another transaction.

## What is **Non-Repeatable Read** in a relational database?

**Non-Repeatable Read** — Getting a different value when rereading a row changed and committed by another transaction.

```sql
SET TRANSACTION ISOLATION LEVEL SERIALIZABLE;
```

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/non-repeatable-read