Technology LearningCheat Sheet
DATABASECHEAT SHEETS
SHEET 02
Normalization, Keys and Constraints
M.R. Sterling
Database Intro · Sheet 02
Normalization, Keys and ConstraintsSQLite
The normalization staircase from a flat table to 3NF, with a real update anomaly happening in front of you. Then the keys and constraints that protect your data, each shown with SQLite's own answer when you break it.
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What is on this sheet
The normalization staircase
The three anomalies
Functional dependency
1NF, 2NF and 3NF
Is my table normalized?
Junction table
Foreign keys
Four guards
Common mistakes
The books this sheet pairs with
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