Neco 2019 Data Processing Question 8
Practice objective / multiple choice question 8 from the 2019 Neco Data Processing examination.
The database has two tables. \(Students(StudentID, Name, Age, Dept)\) and \(Enrolments(StudentID, CourseCode, Grade)\). Write a relational algebra expression that returns the names of students who belong to the Computer Science department and have obtained grade \('A'\) in at least two different courses. Given that the \(Students\) table contains 120 CS students and that 40 of these students satisfy the grade condition, how many names will the query return?
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About This Question
This is Neco 2019 Data Processing Question 8. It is one of the objective questions from the 2019 Neco Data Processing examination.
Difficulty level: Medium .
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