# REPEATABLE READ

An isolation level preventing reread rows from changing during the transaction.

## What is **REPEATABLE READ** in a relational database?

**REPEATABLE READ** — An isolation level preventing reread rows from changing during the transaction.

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

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/repeatable-read