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6 days 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.
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Database Processing: Fundamentals, Design, and Implementation
Edition: 15th
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wrote...
6 days ago
It must have a default value specified.
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