GATE CSE · 2020 · CS
Question 13: Databases
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Question 13
CSMCQ1 markNeeds review
Consider a relational database containing the following schemes.
Catalogue:
sno | pno | cost |
|---|---|---|
S1 | P1 | 150 |
S1 | P2 | 50 |
S1 | P3 | 100 |
S2 | P4 | 200 |
S2 | P5 | 250 |
S3 | P1 | 250 |
S3 | P2 | 150 |
S3 | P5 | 300 |
S3 | P4 | 250 |
Suppliers:
sno | sname | location |
|---|---|---|
S1 | M/s Royal furniture | Delhi |
S2 | M/s Balaji furniture | Bangalore |
S3 | M/s Premium furniture | Chennai |
Parts:
pno | pname | part_spec |
|---|---|---|
P1 | Table | Wood |
P2 | Chair | Wood |
P3 | Table | Steel |
P4 | Almirah | Steel |
P5 | Almirah | Wood |
The primary key of each table is indicated by underlining the constituent fields.
SELECT s.sno, s.sname
FROM Suppliers s, Catalogue c
WHERE s.sno = c.sno AND
cost > (SELECT AVG(cost)
FROM Catalogue
WHERE pno = ‘P4’
GROUP BY pno);
The number of rows returned by the above SQL query is
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2020CS
GATE CSE 2020 · Paper 1
Computer Science and Information Technology · Original paper archive
- Section
- Computer Science and Information Technology
- Question type
- Multiple choice (MCQ)
- Marks
- 1 mark
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