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Question
A relation is in domain/key normal form if ________.A) every key of the relation is a logical consequence of the definition of constraints and determinants
B) every key of the relation is a logical consequence of the definition of constraints and domains
C) every constraint on the relation is a logical consequence of the definition of keys and determinants
D) every constraint on the relation is a logical consequence of the definition of keys and domains
Answer
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Related questions
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Suppose you have created a data model for an airline based on a variety of forms, reports, user interviews, data sources, etc. Your client comes forward with a new desired report that includes passenger weights and a relationship between passengers and employees, neither of which is in your E-R diagram. You should ________.
A) create a new, separate E-R diagram with just the new information
B) add the relationship and the weight attribute to the existing data model
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ID-dependent entities are a common type of weak entity.
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A) IS
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Q:
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Q:
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A) limits the number of columns retrieved from a table
B) limits the number of rows retrieved from a table
C) limits the number of tables retrieved from a database
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Q:
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