Data Model — importance?
Simplifies complex data, aids design and communication.
Data Model Components — includes?
Entities, attributes, relationships, constraints.
Data Model — importance?
Simplifies data complexity, aids design.
Entity — role?
Object about which data is stored.
Relationship types — examples?
1:M, M:N, 1:1.
Business Rules — purpose?
Define data constraints and operations.
Data Abstraction Levels — components?
External, conceptual, internal, physical.
Object-Oriented Model — feature?
Uses objects with attributes and methods.
Hierarchical vs Network Models — difference?
Hierarchical: tree structure; Network: graph structure.
Answer 9 questions on Fundamentals of Data Modeling and Database Design.
1. What is a data model primarily considered as in the context of database design?
2. Who introduced the Entity-Relationship (ER) model in 1976?
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