อะไรคือความแตกต่างระหว่างหลักสูตร PHYSED 414 และ PHYSED 142 ?ไม่จำเป็นต้องใช้ตารางทั้งหมด
What is the difference between the courses PHYSED 414 and PHYSED 142 ?It is not neccessary to use all the tables.
 student_record:  student_id [ int]  course_id [ int]  semester [ int]  grade [ varchar]  how [ varchar]  transfer_source [ varchar]  earn_credit [ varchar]  repeat_term [ varchar]  test_id [ varchar] 
SELECT DISTINCT department, description, number FROM course WHERE (department = 'PHYSED' AND number = 414) OR (department = 'PHYSED' AND number = 142)