Multiple choice

Which of the following guidelines is correct for writing a subquery?

  1. Subquery must be enclosed in a paranthesis.

  2. Subquery must be placed on the right side of the comparison operator.

  3. When a subquery returns a null value, the outer query should not return any row.

  4. Indentation is very helpful in understanding a subquery.

  5. All of the above
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Yes, all are correct.

Keep practicing — related questions