Consider the table Student(stuid, name, course, marks). Which one of the following two queries is correct to find the highest marks student in course 5? Q.1. Select S.stuid From student S Where not exists (select * from student e where e course='5' and e marks ≥ s marks) Q.2. Select S.stuid From student S Where s.marks > any (select distinct marks from student S where s.couse = 5) (A) Q.1 (B) Q.2 (C) Both Q.1 and Q.2 (D) Neither Q.1 nor Q.2

Consider the table

Student(stuid, name, course, marks). Which one of the following two queries is

correct to find the highest marks student in course 5?

Q.1. Select S.stuid

From student S

Where not exists

(select * from student e where e course='5' and e marks ≥ s marks)

Q.2. Select S.stuid

From student S

Where s.marks > any (select distinct marks from student S where s.couse

= 5)

(A) Q.1

(B) Q.2

(C) Both Q.1 and Q.2

(D) Neither Q.1 nor Q.2
by

1 Answer

Answer :

(B) Q.2

Explanation: First query gives stuid of students whose marks are greater than all students taking course 5. Second query gives stuid of students whose marks are greater than any student taking course 5, that is in second query comparison is between min of marks by student enrolled in course 5 and in query one comparison is between maximum of marks by any student in course 5. So the answer is option D.
by

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