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Question
A ____________is a primary key created by a database designer to simplify the identification of entity instances.a. composite key
b. compound key
c. natural key
d. surrogate key
Answer
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Normalization is a process that is used for changing attributes to entities.
a. True
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a. Subtype sets are unique.
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c. Subtype discriminators cannot be null.
d. Subtype does not have a supertype.
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