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Which of the following is not true about representing subtypes in a relational database design?

jonnyjon

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Which of the following is not true about representing subtypes in a relational database design?

Which of the following is not true about representing subtypes in a relational database design?

• One table is created for the supertype and one for each subtype.

• All attributes of the supertype are added to the subtype relations.

• The key of the supertype is made the key of the subtypes.

• An instance of the supertype may be related to one instance each of several subtypes.

Textbook

Database Processing: Fundamentals, Design, and Implementation

Database Processing: Fundamentals, Design, and Implementation

Edition: 15^th

Authors: Kroenke, Auer, Yoder, Vandenberg

Read 159 times

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jonnyjon Author

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5 years ago

Thanks for your help!!

rhockeygirl

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Just got PERFECT on my quiz

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Smart ... Thanks!

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