Core ต้องการคลาสอะไร ?ไม่จำเป็นต้องใช้ตารางทั้งหมด
Core requires what classes ?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.department, course.name, course.number FROM course, program_course WHERE program_course.category LIKE '%Core%' AND program_course.course_id = course.course_id