What is the highest, lowest, and average student GPA for every department?
SELECT max(stu_gpa) ,  avg(stu_gpa) ,  min(stu_gpa) ,  dept_code FROM student GROUP BY dept_code
highest student GPA = MAX(stu_gpa); lowest student GPA = MIN(stu_gpa); average student GPA = AVG(stu_gpa); for every department refers to GROUP BY dept_code;