REES 395 มีคลาสในวันศุกร์หรือไม่ ?ไม่จำเป็นต้องใช้ทุกโต๊ะ
On Friday does REES 395 have class ?It is not neccessary to use all the tables.
 program_requirement:  program_id [ int]  category [ varchar]  min_credit [ int]  additional_req [ varchar] 
SELECT DISTINCT course_offering.friday FROM course INNER JOIN course_offering ON course.course_id = course_offering.course_id INNER JOIN semester ON semester.semester_id = course_offering.semester WHERE course.department = 'REES' AND course.number = 395 AND semester.semester = 'WN' AND semester.year = 2016