อันไหนง่ายกว่า EECS 557 หรือ EECS 250 ?ไม่จำเป็นต้องใช้ตารางทั้งหมด
Which one is easier , EECS 557 or EECS 250 ?It is not neccessary to use all the tables.
 requirement:  requirement_id [ int]  requirement [ varchar]  college [ varchar] 
SELECT DISTINCT course.number FROM course INNER JOIN program_course ON program_course.course_id = course.course_id WHERE (course.number = 557 OR course.number = 250) 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 = 557 OR COURSEalias1.number = 250) AND COURSEalias1.department = 'EECS')