Az Erdе‘rе‘l Official

: Adds more detail, defining attributes and keys but remaining independent of a specific database technology.

: Represented as diamonds or connecting lines, these show how entities interact (e.g., a Customer "places" an Order ). AZ erdЕ‘rЕ‘l

: A high-level view showing major entities and their relationships without technical details. : Adds more detail, defining attributes and keys

: Represented as ovals, these describe the specific characteristics of an entity (e.g., a Customer entity might have attributes like Name or Email ). : Adds more detail

: They serve as high-level documentation of a system’s information architecture. Levels of Abstraction

For professional modeling, tools like Lucidchart or Visual Paradigm are widely used to create and share these diagrams. What is an Entity Relationship Diagram (ERD)? - Lucidchart