Which of the following is FALSE?
2018
Which of the following is FALSE?
Answer: D. Super key satisfies the "minimality" condition — Option D is false because superkeys do not require minimality. Only candidate keys are defined as minimal superkeys without redundant attributes.
- A.
A relation (table) may have multiple secondary keys
- B.
The value of primary key can't be null
- C.
Secondary key is also a candidate key
- D.
Super key satisfies the "minimality" condition
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Correct answer: D
Option D is false because superkeys do not require minimality. Only candidate keys are defined as minimal superkeys without redundant attributes.
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