a diagram used for data modeling and design that depicts a set of real-world entities and the logical relationships between them.
Refer to ERD. Entity. Represent a data store, which has its unique key attribute and its other non-key attributes. Auxiliary Definition. This is a data type that doesn't correspond to any attribute, component of an ERD, or part of a data flow diagram itself, but can be used to define these other things more easily.
A technical specification and road map that describes what types of data that the firm must collect and how to join relational database tables (two or more types of data) to create high level business intelligence.
An industry standard visual representation of an LDM, showing Entities, Relationships and Attributes.
A Diagram that shows the relationship of the modules within the system, and also shows what makes up each module
This is the principle tool used in Data Modeling for Relational Data Model schemas. Superficially an ERD is nearly identical to a UML Class Model used for OOA/D. However, that similarity applies only to the syntax of diagram elements. The semantics of model elements and the construction techniques are very different.
(IEEE) A diagram that depicts a set of real-world entities and the logical relationships among them. See: data structure diagram.
A diagram that pictorially represents entities, the relationships between them and the attributes used to describe them.
A graphical representation of the entities and the relationships between them. Entity relationship diagrams are a useful medium to achieve a common understanding of data among users and application developers.