Q. 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:
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: (A)
Explanation:
