Learning objective
Conceptual data models and entity relationship modelling: Produce a data model from given data requirements for a simple scenario involving multiple entities. Produce entity relationship diagrams representing a data model and entity descriptions in the form: Entity1 (Attribute1, Attribute2,.... ). Underlining can be used to identify the attribute(s) which form the entity identifier. 88
Read the explanation, check the common trap, then practise with flashcards and questions.
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Conceptual data models and entity relationship modelling
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Conceptual data models and entity relationship modelling
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Quick explanation
Conceptual data models and entity relationship modelling: Produce a data model from given data requirements for a simple scenario involving multiple entities. Produce entity relationship diagrams representing a data model and entity descriptions in the form: Entity1 (Attribute1, Attribute2,.... ). Underlining can be used to identify the attribute(s) which form the entity identifier. 88
- This point belongs to Conceptual data models and entity relationship modelling, especially Conceptual data models and entity relationship modelling.
- You need to be able to conceptual data models and entity relationship modelling: Produce a data model from given data requirements for a simple scenario involving multiple entities. Produce entity relationship diagrams representing a data model and entity descriptions in the form: Entity1 (Attribute1, Attribute2,.... ). Underlining can be used to identify the attribute(s) which form the entity identifier. 88.
- Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.
Why it matters
This objective helps connect Conceptual data models and entity relationship modelling to exam-style questions, flashcards, and revision notes for Conceptual data models and entity relationship modelling.
Quick student answer
A library system records members, books and loans. Each loan records which member borrowed which book. Which set of entities is most appropriate for the conceptual data model?
Direct answer
Member, Book and Loan
Key terms
- Conceptual data model: A model describing the entities, attributes and relationships needed to represent the data requirements of a scenario.
- Entity relationship diagram: A diagram that represents a data model by showing entities, their attributes and the relationships between them.
Common trap
Confusing entities with attributes: Identify the main objects first, such as Customer or Hire, then list the descriptive properties as attributes within those entities.
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