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BCNF

4 articles · Page 1 of 1
YiSu Grain
YiSu Grain
Aug 7, 2026 · Databases

Day 50: Relational Database Normalization – From Functional Dependencies to Normal Form Decomposition

This lesson walks through relational database normalization using a messy enrollment table, showing how to derive functional dependencies, identify candidate keys, detect partial, transitive and BCNF violations, and systematically decompose the schema into student, major, course, teacher and enrollment tables while ensuring lossless joins and dependency preservation.

BCNFSQLdatabase-design
0 likes · 30 min read
Day 50: Relational Database Normalization – From Functional Dependencies to Normal Form Decomposition
21CTO
21CTO
Oct 11, 2015 · Databases

From Chaos to Order: Step‑by‑Step Database Normalization up to 4NF

This article explains the purpose of database normalization, outlines its benefits and drawbacks, and walks through a concrete demo that transforms an unnormalized employee table through the first, second, third, BC, and fourth normal forms, illustrating each step with diagrams.

1NF2NF3NF
0 likes · 8 min read
From Chaos to Order: Step‑by‑Step Database Normalization up to 4NF