Diploma in Business Process Management - | pt-BR - 623 - 44681
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Módulo 6: Leitura Entity - diagramas de relacionamento
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  • Nota de Estudos
  • Rever Tópicos
    Vithaya L.
    TH
    Vithaya L.

    What is the different relationship among entities?

    Vithaya L.
    TH
    Vithaya L.

    Please explain different relationship and among entities?

    Vithaya L.
    TH
    Vithaya L.

    What is entity - Relationship Diagrams?

    Hasan R.
    PK
    Hasan R.

    In software engineering, an entity–relationship model (ER model) is a data model for describing the data or information aspects of a business domain or its process requirements, in an abstract way that lends itself to ultimately being implemented in a database such as a relational database. The main components of ER models are entities (things) and the relationships that can exist among them. Entity–relationship modeling was developed by Peter Chen and published in a 1976 paper.[1] However, variants of the idea existed previously,[2] and have been devised subsequently such as supertype and subtype data entities[3] and commonality relationships. Introduction : An entity–relationship model is a systematic way of describing and defining a business process. The process is modeled as components (entities) that are linked with each other by relationships that express the dependencies and requirements between them, such as: one building may be divided into zero or more apartments, but one apartment can only be located in one building. Entities may have various properties (attributes) that characterize them. Diagrams created to represent these entities, attributes, and relationships graphically are called entity–relationship diagrams

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