Q: The Hudson Engineering Group (HEG) has contacted you to create
The Hudson Engineering Group (HEG) has contacted you to create a conceptual model whose application will meet the expected database requirements for the company’s training program. The HEG administrat...
See AnswerQ: What is an entity supertype, and why is it used?
What is an entity supertype, and why is it used?
See AnswerQ: What is an entity cluster, and what advantages are derived from
What is an entity cluster, and what advantages are derived from its use?
See AnswerQ: What primary key characteristics are considered desirable? Explain why each characteristic
What primary key characteristics are considered desirable? Explain why each characteristic is considered desirable.
See AnswerQ: Under what circumstances are composite primary keys appropriate?
Under what circumstances are composite primary keys appropriate?
See AnswerQ: What is a surrogate primary key, and when would you use
What is a surrogate primary key, and when would you use one?
See AnswerQ: When implementing a 1:1 relationship, where should you place
When implementing a 1:1 relationship, where should you place the foreign key if one side is mandatory and one side is optional? Should the foreign key be mandatory or optional?
See AnswerQ: What are time-variant data, and how would you deal
What are time-variant data, and how would you deal with such data from a database design point of view?
See AnswerQ: What factors relevant to database design are uncovered during the initial study
What factors relevant to database design are uncovered during the initial study phase?
See AnswerQ: Why is the organizational structure relevant to the database designer?
Why is the organizational structure relevant to the database designer?
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