首先，什么是实体关系图？ 实体关系图也被称为 ERD、ER 图、实体联系模型、实体联系模式图或 ER 模型，是一种用于数据库设计的结构图。 一幅 ERD 包含不同的符号和连接符，用于显示两 …

Free ERD modeling tool for creating Entity-Relationship Diagrams and relational/star schemas, aiding in visualizing and designing databases.

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 …

An ERD visualizes the relationships between entities like people, things, or concepts in a database. An ERD will also often visualize the attributes of these entities.

ERD 是Entity-Relationship Diagram的缩写，中文意思为实体关系图，也被称为 ERD、ER 图、实体联系模型、实体联系模式图或 ER 模型，是一种用于数据库设计的结构图。

Learn what an entity relationship diagram (ERD) is, how it models data relationships, and how to create one.

Oct 10, 2025 · An entity relationship diagram (also known as an ER diagram or ERD diagram or simply ERD) shows how entities (people, objects, and concepts) interact. These conceptual …

Jul 17, 2025 · 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 …

实体关系图 (ERD) 是一种特殊类型的流程图，用于传达系统内不同实体之间的关系类型。 其使用一组确定的符号，包括矩形、椭圆形和菱形，并以连接线相互连接。

Entity-Relationship Diagrams (ERD) Data models are tools used in analysis to describe the data requirements and assumptions in the system from a top-down perspective.