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1.2. Data models

A data model is a model that describes in an abstract way how data are represented in a business organization, an information system or a database management system - Wikipedia
[Section notes PDF 310Kb].

  • 1.2.01. Introduction
  • 1.2.02. Relational model
  • 1.2.03. Relation
  • 1.2.04. Abstract operations
  • 1.2.05. Basic algebra
  • 1.2.06. Select operation
  • 1.2.07. Project operation
  • 1.2.07. Sequences of operations
  • 1.2.08. Rename operation
  • 1.2.08. Set Theoretic
  • 1.2.08b. Set difference
  • 1.2.09. Cross product
  • 1.2.10. Relational algebra/model notation
  • 1.2.11. Constraints
  • 1.2.12. Referential integrity
‹ 1.1.29. Structured Queryup1.2.01. Introduction ›
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