Which of the following command is correct to delete the values in the relation teaches?

  • A. a) Delete from teaches;
  • B. b) Delete from teaches where Id =’Null’;
  • C. c) Remove table teaches;
  • D. d) Drop table teaches;
Correct Answer: A. a) Delete from teaches;
Breakdown of other options:

DELETE FROM teaches WHERE Id = 'Null';: This command would only delete rows where the Id column has a NULL value. It wouldn't delete all rows.

REMOVE TABLE teaches;: There's no standard SQL command named REMOVE.

DROP TABLE teaches;: This command would delete the entire table structure, including its data and definition, which is typically not desired when you just want to clear the data.

So, the simple and effective way to delete all data from the teaches table is by using DELETE FROM teaches;.

If you think there is any confusion in the given MCQs, you can comment below.

Follow us on WhatsApp

docmcqs.com is Pakistan's No.1 online platform for preparing for all types of exams including PPSC, FPSC, KPSC, SPSC, Ministry of Defence, and for one-paper MCQs. This includes Pedagogy MCQs, general knowledge MCQs, current affairs MCQs, and much more.

Leave a Comment

Your email address will not be published. Required fields are marked *

Scroll to Top