MEDEDUC 883 เปิดให้บริการมานานแค่ไหนแล้ว ?ไม่จำเป็นต้องใช้ทุกโต๊ะ
How long has MEDEDUC 883 been up for offer ?It is not neccessary to use all the tables.
 area:  course_id [ int]  area [ varchar] 
SELECT DISTINCT semester.year FROM course, course_offering, semester WHERE course.course_id = course_offering.course_id AND course.department = 'MEDEDUC' AND course.number = 883 AND semester.semester_id = course_offering.semester ORDER BY semester.year LIMIT 1