มีชั้นเรียนอื่นในฤดูหนาวหรือไม่ ?ไม่จำเป็นต้องใช้ตารางทั้งหมด
Are there any Other classes in the Winter ?It is not neccessary to use all the tables.
 program:  program_id [ int]  name [ varchar]  college [ varchar]  introduction [ varchar] 
SELECT DISTINCT course.department, course.name, course.number FROM course INNER JOIN course_offering ON course.course_id = course_offering.course_id INNER JOIN semester ON semester.semester_id = course_offering.semester INNER JOIN program_course ON program_course.course_id = course_offering.course_id WHERE program_course.category LIKE '%Other%' AND semester.semester = 'Winter' AND semester.year = 2017