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boyob89 boyob89
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8 years ago
For a unary M:N relationship:
A) the entity type and the M:N relationship are modeled as one relation; a composite key is used
B) the entity type is modeled as one relation; using as its primary key a composite key, a separate relation is created to represent the M:N relationship
C) separate relations for the class and for each subclass are created; primary and foreign keys are established for each class
D) the primary key of the entity on the one side of the relationship serves as a foreign key in the relation on the many side of the relationship
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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8 years ago
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boyob89 Author
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#2
8 years ago
i didn't expect someone to answer, this website is awesome
Majoring in Economics, minoring in business
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#3
8 years ago
Glad I could help
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