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Unit 2 The Relational Model

Outline. 2.1 Introduction2.2 Relational Data Structure2.3 Relational Integrity Rules2.4 Relational Algebra2.5 Relational Calculus. ??:????????????????(e.g. ??d=2???d=3?????d=4). (??, ??), (??,??,??), (??,??,??,??). Recall: Stages of Information System. Stage 0: Manual Information System Recor

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Unit 2 The Relational Model

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