select id, course_id, student_id, scores, create_time from course_selection update course_selection set scores = #{scores} where id = #{id} and course_id = #{courseId} and student_id = #{studentId} order by course_id desc, id where id = #{id} insert into course_selection course_id, student_id, scores, remark, #{courseId}, #{studentId}, #{scores}, #{remark}, delete from course_selection where id = #{id} delete from course_selection where id in #{id}