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  1. 2024年7月新紙幣改刷改造対応(グローリー高額紙幣両替機 ...

  2. SQLでER図の作成と読み方を理解する | IT trip

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    By visually showing data tables and their relationships, we can articulate data concepts in an easy-to-digest fashion. They should also align with the requirements and user stories for your Power Platform solution. An ERD is a common step in solution architecture, which should be drafted and agreed before any ‘build’ work starts.
    Relationships in ERDs are represented as lines between two entities, and often have a label on the line to further describe the relationship (such as “enrols”, “registers”, “completes”). There are several types of relationships that are represented on an ERD: One to many: One record of an entity is related to one or more records of another entity.
    An entity is a thing that can have data stored about it. It can be a physical object (e.g. car, person), a concept (e.g. address) or an event (e.g. student enrolment in a course). They represent nouns. They are usually represented as rectangles on an ERD with the entity name inside the rectangle.
    An attribute is a property of an entity or something that can be used to describe an entity. They are often represented as ovals, or as entries inside an entity. There are several different types of attributes represented on an ERD: Simple: an attribute that cannot be split into other attributes, such as a first name.
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