id ,department_id,exam_paper_id,deleted insert into t_exam_paper_department(id,department_id,exam_paper_id,deleted) values (#{item.id},#{item.departmentId},#{item.examPaperId},#{item.deleted}) delete from t_exam_paper_department where id in #{id} select * from t_exam_paper_department where exam_paper_id = #{id} and deleted = 0 SELECT GROUP_CONCAT(b.name) FROM t_user_department a INNER JOIN t_department b ON a.department_id = b.id WHERE a.user_id = #{userId} GROUP BY a.user_id ORDER BY a.user_id delete from t_exam_paper_department where exam_paper_id = #{id} delete from t_exam_paper_department where exam_paper_id in #{id}