Multiple choice

Which of the following is/are true statement in relational database?

  1. In 2nd NF, primary key contains multiple attributes.

  2. In 3 NF, a relation is decomposed and set up a new relation for each partial key.

  3. A functional dependency exists only when both constraints functionally dependent on each other.

  4. All of the above.

  5. Only (1) and (3).
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

All are the true statements.

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