# Normalization

Normalization splits data into tables so each fact is stored once. Spot the problems repeated data causes, and apply the first three normal forms.

![Cheat sheet: Normalization](https://fsdtrainingmedia.blob.core.windows.net/public/images/2026/11/8424b4325fd74e61a9b238f0a1b40081.webp)

- Category: SQL
- Level: Journeyman
- Tags: database, First Normal Form (1NF), Normalization, Second Normal Form (2NF), sql, Third Normal Form (3NF), Update Anomaly
- Updated: November 3, 2026

Source: https://www.ask-codey.com/cheat-sheets/foundations-of-database-design-normalization-cheat-sheet