Podcast
Play an AI-generated podcast conversation about this lesson
Questions and Answers
Which perspective of a data model is a view of the data required to help business processes?
Which perspective of a data model is a view of the data required to help business processes?
- Entity-Relationship (ER) Diagram
- Logical Model
- Physical Data Model
- Conceptual Model (correct)
What is the aim of the conceptual design phase in data modeling?
What is the aim of the conceptual design phase in data modeling?
- To define the physical structure of the database
- To implement the database schema
- To optimize database performance
- To describe the data contained in the database, the relationships between data items, and the constraints on data (correct)
What does the conceptual schema in data modeling provide?
What does the conceptual schema in data modeling provide?
- Optimization techniques for database performance
- A concise description of the data (correct)
- Entity-Relationship (ER) diagrams
- A detailed physical structure of the database
What is the main purpose of the logical model in data modeling?
What is the main purpose of the logical model in data modeling?
Signup and view all the answers
During which phase of database design is the Entity-Relationship (ER) diagram used?
During which phase of database design is the Entity-Relationship (ER) diagram used?
Signup and view all the answers
Flashcards are hidden until you start studying
Study Notes
Data Modeling Perspectives
- External perspective: a view of the data required to support business processes
Conceptual Design Phase
- Aim: to identify the overall structure of the data, without considering how it will be physically implemented
Conceptual Schema
- Provides: a high-level, abstract representation of the data, independent of hardware or software constraints
Logical Model
- Main purpose: to translate the conceptual schema into a logical structure, which can be used to implement the physical database
Database Design Phases
- Entity-Relationship (ER) diagram: used during the conceptual design phase
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
