Getting the above average student from database

Question

I\'ve created a view that contains:

 student_full_name    subject_code    result
 Jennifer Higgins     CS1234          81
 Jennifer Higgins     CS1235                


        

Answer 1

This should do the job. First inner query will give you the result of average of all students. While second will give the avg for the table.

    SELECT student_full_name 
    FROM (SELECT student_full_name,
                 AVG(results) AS average_Sresult
          FROM viewEnrol
          GROUP BY student_full_name) sre, 
         (SELECT (AVG(results)) tavg
          FROM viewEnrol) ta
     WHERE sre.average_Sresult > ta.tavg

PS: Should not you take the avg of avg rather than taking the avg of all results.