: They serve as high-level documentation of a system’s information architecture. Levels of Abstraction
: Represented as rectangles, these are the "nouns" of the system, such as Customer , Order , or Product . AZ erdЕ‘rЕ‘l
: Analysts use them to identify logic errors in existing database structures. : They serve as high-level documentation of a
: Represented as diamonds or connecting lines, these show how entities interact (e.g., a Customer "places" an Order ). such as Customer
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
: They provide a common visual language for stakeholders, business analysts, and engineers to discuss data requirements.