Answer the following questions related to Database System.
Questions are:
•Why use Databases?
•Data Vs. Information
•Database Management System (DBMS)
•Role & Advantages of DBMS
•DATA MODELS
•Hierarchical and Network Models
•The Relational Model
•The Entity Relationship Model
•Relationships.
•The Object-Oriented (OO) Model
•DEGREES OF DATA ABSTRACTION
•The External Model
•The Conceptual Model
•The Internal Model
•The Physical Model