Sql Database Normalization — Free Sql Tutorial
Learn Sql Database Normalization in Sql with a free, beginner-friendly tutorial, examples and practice for Indian students on Syllab.in.
TL;DR: Learn Sql Database Normalization in Sql with a free, beginner-friendly tutorial, examples and practice for Indian students on Syllab.in.
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Sql Database Normalization in Sql
1NF (First Normal Form): Each column contains atomic (indivisible) values; no repeating groups.
2NF (Second Normal Form): In 1NF + all non-key columns depend on the entire primary key (eliminate partial dependencies).
3NF (Third Normal Form): In 2NF + non-key columns depend only on the primary key (eliminate transitive dependencies).
Over-normalization can reduce performance; denormalization trades consistency for speed in read-heavy systems.
Normalize for write-heavy workloads; denormalize for read-heavy analytics.
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