คลาส YIDDISH 531 พบกันบ่อยแค่ไหน ไม่จำเป็นต้องใช้ตารางทั้งหมด
How often does the class YIDDISH 531 meet ?It is not neccessary to use all the tables.
 semester:  semester_id [ int]  semester [ varchar]  year [ int] 
SELECT DISTINCT course_offering.friday, course_offering.monday, course_offering.saturday, course_offering.sunday, course_offering.thursday, course_offering.tuesday, course_offering.wednesday 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 = 'YIDDISH' AND course.number = 531 AND semester.semester = 'WN' AND semester.year = 2016