GATE CSE · 2018 · CS
Question 12: Databases
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Question 12
CSMCQ1 markNeeds review
Consider the following two tables and four queries in SQL.
Book (isbn, name), 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?
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2018CS
GATE CSE 2018 · 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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