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GATE | GATE CS 2019 | Question 61
A relational database contains two tables Student and Performance as shown below:
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:
Note: This was Numerical Type question.
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 _________ .
Note: This was Numerical Type question.
(A)
5
(B)
4
(C)
3
(D)
None of these.
Answer
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