Az Erdе‘rе‘l May 2026

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

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

: The most detailed version, showing actual table structures, data types, and constraints for a specific database management system. : They provide a common visual language for

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