<% student_work_scores = StudentWorksScore.find_by_sql("select max(created_at) as created_at, student_work_id, user_id from student_works_scores where student_work_id in #{sw_id} group by student_work_id order by max(created_at) desc") %>
<%# student_work_scores = StudentWorksScore.where("student_work_id in #{sw_id}").reorder("created_at desc") %>
