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ERD AND EERD?

Hi guys I just want to ask what is the exact difference between ERD(entity relationship diagram) and EERD(enhanced enitity relatioship diagram?

Comments

  • BBOSABBOSA Posts: 2Member
    erd are data model tools used in analysis to describe the data requirements and assumptions in the system from a top-down perspective. They also set the stage for the design of databases later on in the SDLC.There are three basic elements in ER models:
    Entities are the "things" about which we seek information.
    Attributes are the data we collect about the entities.
    Relationships provide the structure needed to draw information from multiple entities.
    while eerd
    Contain all the basic modeling concepts of an ER Diagram
    Adds additional concepts:
    Specialization/generalization
    Subclass/super class
    Categories
    Attribute inheritance

  • BBOSABBOSA Posts: 2Member
    erd are data model tools used in analysis to describe the data requirements and assumptions in the system from a top-down perspective. They also set the stage for the design of databases later on in the SDLC.There are three basic elements in ER models:
    Entities are the "things" about which we seek information.
    Attributes are the data we collect about the entities.
    Relationships provide the structure needed to draw information from multiple entities.
    while eerd
    Contain all the basic modeling concepts of an ER Diagram
    Adds additional concepts:
    Specialization/generalization
    Subclass/super class
    Categories
    Attribute inheritance

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