ข้อกำหนดเบื้องต้นที่พบบ่อยที่สุดในภาคการศึกษานี้คืออะไร?ไม่จำเป็นต้องใช้ตารางทั้งหมด
What is the most common prerequisite this semester ?It is not neccessary to use all the tables.
 program_requirement:  program_id [ int]  category [ varchar]  min_credit [ int]  additional_req [ varchar] 
SELECT COUNT(DISTINCT course_prerequisite.course_id), course.department, course.name, course.number FROM course, course_offering, course_prerequisite, semester WHERE course.course_id = course_offering.course_id AND course.course_id = course_prerequisite.pre_course_id AND course.department = 'EECS' AND semester.semester = 'WN' AND semester.semester_id = course_offering.semester AND semester.year = 2016 GROUP BY course_prerequisite.pre_course_id ORDER BY COUNT(course_prerequisite.course_id) DESC