1
GATE CSE 2019
Numerical
+2
-0.67
A relational database contains two tables Student and Performance as shown below:
GATE CSE 2019 Database Management System - Structured Query Language Question 3 English
The primary key of the Student table is Roll_no. For the Performance table, the columns Roll_no. and Subject_code together from the primary key. Consider the SQL query given below:

SELECT S.Student_name, sum (P.Marks)
       FROM Student S, Performance P
       WHERE P.Marks > 84
       GROUP BY S.Student_name;


The number of rows returned by the above SQL query is _____.
Your input ____
2
GATE CSE 2016 Set 2
Numerical
+2
-0
Consider the following database table named $$water$$_$$schemes :$$

water_schemes
scheme_no district_name capacity
1 Ajmer 20
1 Bikaner 10
2 Bikaner 10
3 Bikaner 20
1 Churu 10
2 Churu 20
1 Dungargarh 10

The number of tuples returned by the following $$SQL$$ query is _______________.

with total(name, capacity) as
    select district_name, sum(capacity)
    from water_schemes
    group by district_name
with total_avg(capacity) as
    select avg(capacity)
    from total
select name
    from total, total_avg
    where total.capacity ≥ total_avg.capacity
Your input ____
3
GATE CSE 2015 Set 1
Numerical
+2
-0

Consider the following relation:

Student

Roll_No Student_Name
1 Raj
2 Rohit
3 Raj

Performance

Roll_No Course Marks
1 Math 80
1 English 70
2 Math 75
3 English 80
2 Physics 65
3 Math 80

Consider the following SQL query.

SELECT S.Student_Name, Sum(P.Marks) 
FROM Student S, Performance P
WHERE S.Roll_No= P.Roll_No
GROUP BY S.STUDENT_Name
The numbers of rows that will be returned by the SQL query is___________.
Your input ____
4
GATE CSE 2014 Set 2
MCQ (Single Correct Answer)
+2
-0.6
SQL allows duplicate tuples in relations, and correspondingly defines the multiplicity of tuples in the result of joins. Which one of the following queries always gives the same answer as the nested query shown below:
Select * from R where a in (select S.a from S)
A
Select R.* from R, S where R.a = S.a
B
Select distinct R.* from R, S where R.a = S.a
C
Select R.* from R, (select distinct a from S) as S1 where R.a = S1.a
D
Select R.* from R, S where R.a = S.a and is unique R
GATE CSE Subjects
Software Engineering
Web Technologies
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
Defence
NDA
CBSE
Class 12