1
GATE CSE 2022
Numerical
+2
-0

Consider the relational database with the following four schemas and their respective instances.

Student( $$\underline {sNo} $$ , sName, dNo) Dept( $$\underline {dNo} $$ , dName)

Course( $$\underline {cNo} $$ , cName, dNo) Register( $$\underline {sNo} $$ , $$\underline {cNo} $$ )

GATE CSE 2022 Database Management System - Structured Query Language Question 2 English

SQL Query :

SELECT * FROM Student AS S WHERE NOT EXIST

(SELECT cNo FROM Course WHERE dNo = "D01"

EXCEPT

SELECT cNo FROM Register WHERE sNo = S.sNo)

The number of rows returned by the above SQL query is _____________.

Your input ____
2
GATE CSE 2021 Set 2
MCQ (Single Correct Answer)
+2
-0.66

The relation scheme given below is used to store information about the employees of a company, where empId is the key and deptId indicates the department to which the employee is assigned. Each employee is assigned to exactly one department.

emp(empId, name, gender, salary, deptId)

Consider the following SQL query:

select deptId, count(⋆)

from emp

where gender = "female" and salary > (select avg(salary) from emp)

group by deptId;

The above query gives, for each department in the company, the number of female employees whose salary is greater than the average salary of

A
female employees in the department.
B
employees in the department.
C
employees in the company.
D
female employees in the company.
3
GATE CSE 2019
Numerical
+2
-0
A relational database contains two tables Student and Performance as shown below :
GATE CSE 2019 Database Management System - Structured Query Language Question 5 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 ____
4
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 ____
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