ระดับบนมีกี่หน่วยกิต ?ไม่จำเป็นต้องใช้ตารางทั้งหมด
How many classes of the upper level are 1 credits ?It is not neccessary to use all the tables.
 program:  program_id [ int]  name [ varchar]  college [ varchar]  introduction [ varchar] 
SELECT COUNT(DISTINCT course.course_id) FROM course INNER JOIN program_course ON program_course.course_id = course.course_id WHERE course.credits = 1 AND program_course.category LIKE 'ULCS'