Questions and Answers
Which phase involves the mapping of the conceptual data model to a logical data model?
Phase 3: Logical design (data model mapping)
What is used to represent the structural constraints on a relationship in the Entity-Relationship (ER) Model?
Cardinality ratio and Participation Constraints
In which design phase do we interview prospective database users to understand and document their data requirements?
Phase 1: Requirements collection and analysis
Which type of constraint specifies whether the existence of an entity depends on its being related to another entity?
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In which phase of design do we focus on the physical implementation of the database?
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Study Notes
Database Design Phases
- The logical design phase involves the mapping of the conceptual data model to a logical data model.
- In the requirements gathering phase, we interview prospective database users to understand and document their data requirements.
Entity-Relationship (ER) Model
- Structural constraints on a relationship in the ER Model are represented using cardinality constraints.
- A existential constraint specifies whether the existence of an entity depends on its being related to another entity.
Physical Design Phase
- The physical design phase focuses on the physical implementation of the database.
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