Gce Model Questions Vol1 2021 Computer Studies Question 7
Practice objective / multiple choice question 7 from the 2021 Gce Model Questions Vol1 Computer Studies examination.
Given the following tables: Students( StudentID, Name, DeptID ) \begin{array}{c|c|c} \text{StudentID} & \text{Name} & \text{DeptID}\\\hline 1 & Alice & D01\\ 2 & Bob & D02\\ 3 & Carol & D01\\ 4 & Dave & D03\\ 5 & Eve & D02\\ \end{array} Enrolments( StudentID, CourseCode, Grade ) \begin{array}{c|c|c} \text{StudentID} & \text{CourseCode} & \text{Grade}\\\hline 1 & CS101 & 78\\ 1 & MA101 & 85\\ 2 & CS101 & 92\\ 2 & PH101 & 88\\ 3 & MA101 & 73\\ 3 & CS101 & 67\\ 4 & PH101 & 90\\ 5 & CS101 & 55\\ \end{array} Dept( DeptID, DeptName, Budget ) \begin{array}{c|c|c} \text{DeptID} & \text{DeptName} & \text{Budget}\\\hline D01 & Engineering & 500000\\ D02 & Science & 300000\\ D03 & Arts & 200000\\ \end{array} Consider the SQL query: SELECT d.DeptName, AVG(e.Grade) AS AvgGrade FROM Dept d JOIN Students s ON d.DeptID = s.DeptID JOIN Enrolments e ON s.StudentID = e.StudentID WHERE e.Grade >= (SELECT AVG(Grade) FROM Enrolments) GROUP BY d.DeptName HAVING COUNT(DISTINCT s.StudentID) >= 2; What result set does this query return?
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This is Gce Model Questions Vol1 2021 Computer Studies Question 7. It is one of the objective questions from the 2021 Gce Model Questions Vol1 Computer Studies examination.
Difficulty level: Hard .
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