Discuz! Database Error

(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 0,1' at line 1
SELECT aid,title,pic from portal_article_title where catid= order by aid DESC limit 0,1

PHP Debug

No.FileLineCode
1baike.php44require(%s)
2source/module/baike/baike_show.php130discuz_database::fetch_first(%s)
3source/class/discuz/discuz_database.php94discuz_database::query(%s, Array, false, false)
4source/class/discuz/discuz_database.php139db_driver_mysql->query(%s, false, false)
5source/class/db/db_driver_mysql.php152db_driver_mysql->halt(%s, %d, %s)
6source/class/db/db_driver_mysql.php223break()
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