Entity Relationship Arrows. Show a many one relationship by an arrow entering the one side. An arrow from entity set to relationship set indicates a key constraint i e.
An arrow from entity set to relationship set indicates a key constraint i e. A thick line indicates both i e. Using erd software engineers can control every aspect of database development.
Show a many one relationship by an arrow entering the one side.
A thick line indicates both i e. A thick line indicates both i e. Er modeling enables you to examine data specifications systematically to make a well made data base. Entity relationship diagrams are widely used in software engineering.
