Az Erdе‘rе‘l May 2026

An is a visual report used to design and model relational databases by illustrating how different "entities" (like people, objects, or concepts) relate to one another within a system. Core Components of an ERD

: They provide a common visual language for stakeholders, business analysts, and engineers to discuss data requirements. AZ erdЕ‘rЕ‘l

: Represented as rectangles, these are the "nouns" of the system, such as Customer , Order , or Product . An is a visual report used to design

: They act as a blueprint for developers to build the actual physical database. such as Customer

: Analysts use them to identify logic errors in existing database structures.