หลักสูตรใดง่ายกว่า EECS 512 หรือ EECS 434 ?ไม่จำเป็นต้องใช้ทุกตาราง
Which course is easier  EECS 512 or EECS 434 ?It is not neccessary to use all the tables.
 comment_instructor:  instructor_id [ int]  student_id [ int]  score [ int]  comment_text [ varchar] 
SELECT DISTINCT course.number FROM course INNER JOIN program_course ON program_course.course_id = course.course_id WHERE (course.number = 512 OR course.number = 434) AND program_course.workload = (SELECT MIN(PROGRAM_COURSEalias1.workload) FROM program_course AS PROGRAM_COURSEalias1 INNER JOIN course AS COURSEalias1 ON PROGRAM_COURSEalias1.course_id = COURSEalias1.course_id WHERE (COURSEalias1.number = 512 OR COURSEalias1.number = 434) AND COURSEalias1.department = 'EECS')