PHIL 433 ใช้งานได้นานเท่าใด ?ไม่จำเป็นต้องใช้ทุกโต๊ะ
PHIL 433 has been available for how long ?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 = 'PHIL' AND course.number = 433 AND semester.semester_id = course_offering.semester ORDER BY semester.year LIMIT 1