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安裝中文字典英文字典辭典工具!
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- ER 图是什么？这一篇让你搞懂 ER 图！ - 知乎专栏
ER图也称 实体-联系图 (Entity Relationship Diagram)，提供了表示实体类型、 属性 和联系的方法，用来描述现实世界的概念模型。 ER 图由下面三个要素组成： 实体：通常是现实世界的业务对象，当然使用一些逻辑对象也可以。
- ER Diagram (ERD) - Definition Overview - Lucidchart
What is an Entity Relationship Diagram (ERD)? See ultimate guide to ER diagrams including a video overview, origins, uses, examples, components, limitations, and guidelines on how to draw them for free in Lucidchart
- A Guide to the Entity Relationship Diagram (ERD)
An Entity Relationship Diagram (ERD) is a type of diagram that lets you see how different entities (e g people, customers, or other objects) relate to each other in an application or a database They are created when a new system is being designed so that the development team can understand how to structure the database
- Introduction of ER Model - GeeksforGeeks
ER diagrams represent the E-R model in a database, making them easy to convert into relations (tables) These diagrams serve the purpose of real-world modeling of objects which makes them intently useful
- ER Diagram Tool | Free Online App - SmartDraw
An entity-relationship diagram, or ER diagram, models the logical relationships between entities and thereby can help engineers troubleshoot issues or discover inefficiencies in existing database designs These diagrams can also help engineers design new databases and make sure they can uncover design flaws before they're implemented in production
- ER图画法及图形含义、举例说明、通俗易懂 - CSDN博客
本文详细介绍e-r图的基本元素，包括长方形实体、椭圆形属性、菱形关系等，并指导如何根据实际系统设计er图，适合毕业设计和文档报告。 ER图画法及图形含义、举例说明、通俗易懂
- What is Entity Relationship Diagram (ERD)? - Visual Paradigm
Entity Relationship Diagram, also known as ERD, ER Diagram or ER model, is a type of structural diagram for use in database design An ERD contains different symbols and connectors that visualize two important information: The major entities within the system scope, and the inter-relationships among these entities And that's why it's called
- What Is an Entity Relationship Diagram (ERD)? | An . . . - Creately
What Is an ER diagram? An Entity Relationship Diagram (ERD) is a visual representation of different entities within a system and how they relate to each other It is a tool used to design and model relational databases, and shows the logical structure of the database
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