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Normalisation - PowerPoint PPT Presentation


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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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purpose
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