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Entity-Relationship (ER) Diagrams

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Entity-Relationship (ER) Diagrams


 
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Entity-Relationship (ER) Diagrams

  • The representation of data is often accomplished using diagrams

  • ER diagrams are usually used to depict databases

  • Extremely simple – three types of nodes

  • Entity and Relations form a graph and can have associated attributes and cardinality

    Attribute

    Entity

    Relationship

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