Three-Level Architecture
Explore the three-level database architecture which divides data views into external, conceptual, and internal levels. Understand how this separation provides logical and physical data independence, enabling flexible, maintainable, and scalable database systems without impacting user applications during structural or performance changes.
Have we ever wondered how an online store, like Amazon, can show us a personalized homepage with our order history, while a warehouse manager sees a completely different screen with stock levels and supplier details, and a data analyst sees yet another view for sales reports?
They are all accessing the same database, but they see it in ways tailored to their specific needs.
This magic is made possible by a clever design principle known as the three-level architecture. It separates what the user sees from how the data is actually stored, making databases incredibly flexible and powerful. In this lesson, we’ll explore this foundational concept. ...