Az — Erdе‘rе‘l

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

: Adds more detail, defining attributes and keys but remaining independent of a specific database technology. AZ erdЕ‘rЕ‘l

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

: They provide a common visual language for stakeholders, business analysts, and engineers to discuss data requirements. : They provide a common visual language for

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

: A high-level view showing major entities and their relationships without technical details.

: Represented as rectangles, these are the "nouns" of the system, such as Customer , Order , or Product .