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boyob89 boyob89
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7 years ago
Which of the following properties should be satisfied when the identifier of the entity type becomes the primary key of the corresponding relation?
A) The key must be a composite of a primary key and a secondary key.
B) The key should serve as a foreign key in at least two other relations.
C) The value of the key must uniquely identify every row in the relation.
D) The key should be an intelligent key.
Textbook 
Modern Systems Analysis and Design

Modern Systems Analysis and Design


Edition: 4th
Authors:
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Majoring in Economics, minoring in business
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MartyJayMartyJay
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7 years ago
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boyob89 Author
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#2
7 years ago
finally Slight Smile

thx for your expertise
Majoring in Economics, minoring in business
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#3
7 years ago
Ping me if you need anything else
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