Karteikarten: Fundamentals of Data Modeling and Database Design — 9 Karten

Data Model — importance?

Simplifies complex data, aids design and communication.

Data Model — importance?

Simplifies data complexity, aids design.

Data Model Components — includes?

Entities, attributes, relationships, constraints.

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.