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In a group of 50 students who either want to join defence forces or paramilitary forces, out of which 40 students want to join defence forces and 30 want to join paramilitary forces. Find the number of students who want to join only defence forces.
Consider the following two tables and four queries in SQL. Book (isbn, bname), Stock (isbn, copies) Query 1: SELECT B.isbn, S.copies FROM Book B INNER JOIN Stock S ON B.isbn = S.isbn;   Query 2: SELECT B.isbn, S.copies FROM Book B LEFT OUTER JOIN Stock S ON B.isbn = S.isbn; Query 3: SELECT B.isbn, S.copies FROM Book B RIGHT OUTER JOIN Stock S ON B.isbn = S.isbn;   Query 4: SELECT B.isbn, S.copies FROM Book B FULL OUTER JOIN Stock S ON B.isbn = S.isbn;   Which one of the queries above is certain to have an output that is a superset of the outputs of the other three queries?
In class, students want to join sports. 15 people will join football, 24 people will join basketball, and 7 people will join both. How many people are there in the class?
Which of the following statements is/ are true ? A. The terms 'true' and 'false' apply to arguments. B. The terms 'true' and 'false' apply to statements. C. The terms 'valid' and 'invalid' apply to arguments. D. The terms 'cogent' and 'non-cogent' apply to statements. Choose the correct answer from the options given below:
Which of the following statement is correct? Answer using given below:
(1) Doctrine of indoor management apply in case of knowledge of irregularity in company.
(2) Doctrine of indoor management does not apply in case of suspicion of irregularity.
(3) Doctrine of indoor management apply in case of forgery.
(4) Doctrine of indoor management does not apply if the act of an officer of a company is one which would ordinarily be beyond the powers of such an officer.
Post office protocol (POP) is a message access protocol which is used to extract message for client. In this regard, which of the following are true ? (A) POP has two modes, Delete mode and keep (B) In Delete mode, mail is deleted from mail box after each retrival (C) In Delete mode, mail is deleted from mail box before each retrieval (D) In keep mode, mail is deleted before retrival (E) In keep mode, mail remains in mail box after retrival Choose the correct answer from the options given below:
What is the code required to delete all “weight” tags? ; c) delete pt; d) delete pt..weight;
A multiple-table delete cannot apply any join.
Consider the following with reference to Article 18? (a) No title, not being a military or academic distinction, shall be conferred by the State. (b) The citizen of India shall accept any title from any foreign State. (c) No person who is not a citizen of India shall, while he holds any office of profit or trust under the State, accept without the consent of the President any title from any foreign State. (d) The person holding any office of profit or trust under the State shall, without the consent of the President, accept any present, emolument, or office of any kind from or under any foreign State.
In a query's Design View, right-clicking the sloping portion of the join line between two tables and selecting Delete will delete what?