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Questions and Answers
What is the aim of the data modeling phase?
What is the aim of the data modeling phase?
- To describe the relationships between data items
- To depict the constraints on data
- To capture important concepts and rules visually (correct)
- To design the physical database
What is the process of capturing important concepts and rules visually in a diagram called?
What is the process of capturing important concepts and rules visually in a diagram called?
- Data visualization
- Database development
- Data modeling (correct)
- Entity-Relationship Diagram (ERD) construction
Which type of model is the first stage and provides a high-level picture of database design?
Which type of model is the first stage and provides a high-level picture of database design?
- Relational model
- Flat file model
- Object-oriented model
- Hierarchical model (correct)
What are some common types of database models?
What are some common types of database models?
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What is the main purpose of an Entity-Relationship Diagram (ERD)?
What is the main purpose of an Entity-Relationship Diagram (ERD)?
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Study Notes
Data Modeling Phase
- Aims to identify and organize data structures and relationships to support business processes and requirements
Data Modeling Techniques
- Capturing important concepts and rules visually in a diagram is called data modeling or conceptual modeling
Database Design
- The first stage of database design is the Conceptual Data Model, which provides a high-level picture of the database design
- Common types of database models include:
- Conceptual Data Model
- Logical Data Model
- Physical Data Model
Entity-Relationship Diagram (ERD)
- The main purpose of an ERD is to graphically represent the structure of a database, depicting entities, attributes, and relationships
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