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Dolores Mutuku
2,211 PointsMuch better way to write the code for MOST POPULAR ELECTIVE TEACHER
-- Which elective teacher is the most popular (teaches the most students)?
WITH STUDENTS_TAUGHT_BY_ELECTIVE_TEACHERS AS ( SELECT TEACHERS.FIRST_NAME, TEACHERS.LAST_NAME, COUNT(*)"CT" FROM TEACHERS JOIN CLASSES ON CLASSES.TEACHER_ID = TEACHERS.ID JOIN SCHEDULE ON SCHEDULE.CLASS_ID = CLASSES.ID JOIN STUDENTS ON STUDENTS.ID = SCHEDULE.STUDENT_ID JOIN SUBJECTS ON SUBJECTS.ID = CLASSES.SUBJECT_ID WHERE SUBJECTS.GRADE IS NULL GROUP BY TEACHERS.FIRST_NAME ) SELECT FIRST_NAME, LAST_NAME, MAX(CT) FROM STUDENTS_TAUGHT_BY_ELECTIVE_TEACHERS
