出错啦！
错误信息：You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'order by `px` desc,`id_lm` desc limit 1' at line 1
错误编号：1064
SQL语句：select `id_lm`,`title_lm` from `info_lm` where `id_lm`= order by `px` desc,`id_lm` desc limit 1