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trancy trancy
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5 years ago
Which of the following is not true about a NULL attribute?

• On insertion, entering the data for that field is optional.

• It is an important property of an attribute.

• It must have a default value specified.

• A primary key can't be NULL.
Textbook 
Database Processing: Fundamentals, Design, and Implementation

Database Processing: Fundamentals, Design, and Implementation


Edition: 15th
Authors:
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wrote...
5 years ago
It must have a default value specified.
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