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GATE | GATE-CS-2017 (Set 1) | Question 59
Consider a database that has the relation schema CR(StudentName, CourseName). An instance of the schema CR is as given below.
The following query is made on the database.
T1 ← πCourseName(σStudentName=’SA’(CR))
T2 ← CR ÷ T1
The number of rows in T2 is ________.
Note: This questions appeared as Numerical Answer Type.
The following query is made on the database.
T1 ← πCourseName(σStudentName=’SA’(CR))
T2 ← CR ÷ T1
The number of rows in T2 is ________.
Note: This questions appeared as Numerical Answer Type.
(A)
2
(B)
3
(C)
4
(D)
5
Answer
Please comment below if you find anything wrong in the above post
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