Database

Learn the core components of ER models in DBMS—entities, attributes, and relationships. Discover ER diagram symbols and how to represent data structures visually and efficiently.

Learn what relationship attributes are in ER models, why they matter, and how to use them with clear examples like student enrollments and employee positions.

Learn what weak entities are in ER diagrams. Understand how they depend on strong entities, how partial keys work, and how to represent weak entities with clear examples.

Learn what weak entities are in ER diagrams. Understand how they depend on strong entities, how partial keys work, and how to represent weak entities with clear examples.

Learn what data modeling is, why it's important, and how it helps structure databases. This beginner-friendly guide covers key objectives, benefits, and real-life examples.