# SERIALIZABLE

The strongest standard isolation level, requiring results consistent with some serial order.

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

**SERIALIZABLE** — The strongest standard isolation level, requiring results consistent with some serial order.

```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/serializable