请检查执行语句是否正确或录入内容是否正确!

错误文件：/s.php
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 'and id< and delstate='' order by id desc limit 0,1' at line 1Error sql:select * from `hadianb_infoimg` where classid= and id< and delstate='' order by id desc limit 0,1