An Entity-relationship model is an abstract conceptual representation of structured data. Entity-relationship modeling is a relational schema database modeling method, used in software engineering to produce a type of conceptual data model (or semantic data model) of a system, often a relational database, and its requirements in a top-down fashion. Diagrams created using this process are called entity-relationship diagrams, or ER diagrams for short. Originally proposed in 1976 by Dr. Pin-Shan (Peter) Chen many variants of the process have subsequently been devised.
Subscribe to:
Post Comments (Atom)
No comments:
Post a Comment