ARABIC 503 เปิดสอนกี่ภาคการศึกษา ไม่จำเป็นต้องใช้ตารางทั้งหมด
How many semesters has ARABIC 503 been offered ?It is not neccessary to use all the tables.
 program:  program_id [ int]  name [ varchar]  college [ varchar]  introduction [ varchar] 
SELECT DISTINCT semester.year FROM course, course_offering, semester WHERE course.course_id = course_offering.course_id AND course.department = 'ARABIC' AND course.number = 503 AND semester.semester_id = course_offering.semester ORDER BY semester.year LIMIT 1