Az Erdе‘rе‘l May 2026

: Defines the numerical relationship between entities, such as one-to-one , one-to-many , or many-to-many . Why ERDs are Useful

: Represented as ovals, these describe the specific characteristics of an entity (e.g., a Customer entity might have attributes like Name or Email ). AZ erdЕ‘rЕ‘l

: They serve as high-level documentation of a system’s information architecture. Levels of Abstraction : Defines the numerical relationship between entities, such