ASTRO 255 มีให้บริการในส่วนใดส่วนหนึ่งระหว่างเวลา 900 ถึง 100 น. ?ไม่จำเป็นต้องใช้ทุกโต๊ะ
IS ASTRO 255 offered in any section between the hours of 900 and 100 ?It is not neccessary to use all the tables.
 course_offering:  offering_id [ int]  course_id [ int]  semester [ int]  section_number [ int]  start_time [ time]  end_time [ time]  monday [ varchar]  tuesday [ varchar]  wednesday [ varchar]  thursday [ varchar]  friday [ varchar]  saturday [ varchar]  sunday [ varchar]  has_final_project [ varchar]  has_final_exam [ varchar]  textbook [ varchar]  class_address [ varchar]  allow_audit [ varchar] 
SELECT DISTINCT course_offering.end_time, course_offering.section_number, course_offering.start_time FROM course, course_offering, semester WHERE course_offering.end_time <= '1:00' AND course_offering.start_time >= '9:00' AND course.course_id = course_offering.course_id AND course.department = 'ASTRO' AND course.number = 255 AND semester.semester = 'WN' AND semester.semester_id = course_offering.semester AND semester.year = 2016