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1.2.03. Relation

  • Relation schema R(A1, A2, A3.. An)
    • Design side
    • Assertion/declaration
  • Relation state
    • Data side
    • set of n-tuples
      • each one an ordered list of values
        • 1NF: each value is atomic, no composite/multivalue

    Data-design divide

    ‹ 1.2.02. Relational modelup1.2.04. Abstract operations ›
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