This advanced SQL exercise is part of the book: Advanced SQL – Practical Techniques and Use-Cases, which includes 100 day-to-day SQL challenges (and solutions), need-to-know advanced features, and key concepts.
Given the following students table. Each row in this table specifies a student id, student name, subject, and grade.
CREATE TABLE studentGrades (s_id int identity(1,1), s_name varchar(25), s_prof varchar(25), s_grade int)