Q1Database Management System
Question
10 marks
(a) Explain the E-R model in detail with a suitable example. (b) Explain the various symbols used in E-R diagrams.
Answer
ER model overview.
The Entity-Relationship (ER) model is a high-level conceptual data model. It represents real-world objects as entities and their interactions as relationships. Symbols include Rectangles (Entities), Ellipses (Attributes), Diamonds (Relationships), and Double Ellipses (Multi-valued attributes).