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Which of the following is a key part of logical design in an entity relationship model?This model avoids any database model-specific details.This model converts entities into tables.This model has normalization that occurs.In this model, no attributes are specified.

Question

Which of the following is a key part of logical design in an entity relationship model?This model avoids any database model-specific details.This model converts entities into tables.This model has normalization that occurs.In this model, no attributes are specified.

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Solution

The key part of logical design in an entity-relationship model is "This model converts entities into tables."

Here's a step-by-step explanation:

  1. Entity-Relationship Model: This is a high-level conceptual data model that defines the data elements and their relationships for a specified system. It's used to design and represent data in a logical manner, independent of any specific technology or database management system.

  2. Logical Design: This is the phase where you define the entities, attributes, and relationships between entities. It's a conceptual representation of the data structure.

  3. Converting Entities into Tables: In the logical design phase, entities are converted into tables. Each entity becomes a table, and the attributes of the entity become the columns of the table. The relationships between entities are represented as foreign keys in the tables. This is a key part of logical design in an entity-relationship model.

The other options mentioned are not key parts of the logical design in an entity-relationship model. Avoiding database model-specific details and not specifying attributes are more related to the conceptual design phase, which is more abstract and high-level. Normalization usually occurs after the logical design phase, during the physical design phase, to optimize the structure of the database.

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