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Normalisation

Normalisation Purpose Normalization is a set of rules to aid in the design of relational databases Eliminate duplication of data Use key fields to link tables Normal forms 5 levels Only concerned with first three 1NF: Eliminate repeating groups 2NF: Eliminate redundant data

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Normalisation

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  1. Normalisation

  2. Purpose • Normalization is a set of rules to aid in the design of relational databases • Eliminate duplication of data • Use key fields to link tables • Normal forms • 5 levels • Only concerned with first three

  3. 1NF: Eliminate repeating groups

  4. 2NF: Eliminate redundant data

  5. 3NF: Remove non-key dependencies

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