发生了一个数据库错误

Error Number: 1064

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 aid DESC limit 1' at line 1

SELECT * FROM `new_article` WHERE aid<403 and cid= ORDER BY aid DESC limit 1

Filename: C:\www.anticancer.com.hk\system\database\DB_driver.php

Line Number: 331