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Lesson 25 / 2988%
Database Fundamentals14/15

Database Normalization

Splitting tables to remove redundancy — 1NF → 5NF.

// normalization · clean a messy table step by stepRaw tablecomma-separated values · transitive deps1NFatomic cells · one value per row × column2NFevery non-key column depends on the FULL PK3NFno transitive deps · split out address → zip tableid | name | courses | zip → city1 | Asha | "math,phy,chem" | 110001 → "New Delhi"2 | Ravi | "math,bio" | 110001 → "New Delhi"
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