CAAS 438 ให้บริการในช่วงเช้าใด ?ไม่จำเป็นต้องใช้ทุกโต๊ะ
CAAS 438 is offered at what morning times ?It is not neccessary to use all the tables.
 program:  program_id [ int]  name [ varchar]  college [ varchar]  introduction [ varchar] 
SELECT DISTINCT course_offering.end_time, course_offering.start_time, semester.semester, semester.year FROM course, course_offering, semester WHERE course_offering.start_time < '12:00:00' AND course_offering.start_time >= '08:00:00' AND course.course_id = course_offering.course_id AND course.department = 'CAAS' AND course.number = 438 AND semester.semester = 'semester0' AND semester.semester_id = course_offering.semester AND semester.year = year0