delete from sys_role_userfile where role_id=#{roleId} select count(1) from sys_role_userfile where userFileId=#{userFileId} delete from sys_role_userfile where role_id in #{roleId} insert into sys_role_userfile(role_id, userFileId) values (#{item.roleId},#{item.userFileId}) SELECT f.userFileId FROM userfile f LEFT JOIN sys_role_userfile rf ON f.userFileId = rf.userFileId WHERE role_id = #{roleId} AND deleteFlag = 0