View Design Composite Key Erd Example Download Zip PNG. Compound keys are most commonly seen in intermediary tables (junction tables). Instantly share code, notes, and snippets.
• some times key attributes can be composite attributes.
Composite design pattern example code. Students entity can have attributes like rollno for that, weak entity sets need to have participation. Among them is the many to many relationship here. Entity relationship diagrams use a specific set of symbols, such as shapes and arrows, to depict the system and database.