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 'a.authorid>'0' and a.price>'0' and a.displayorder>='0' order by a.tid desc' at line 1
select count(*) from forum_thread a left join plugin_ljwenwen_tw b on a.tid=b.tid where a.fid =2 a.authorid>'0' and a.price>'0' and a.displayorder>='0' order by a.tid desc

PHP Debug

No.FileLineCode
1plugin.php47include(%s)
2source/plugin/ljww360/list.inc.php72table_plugin_ljwenwen_tw->fetch_by_count_forum_thread_join(%s)
3source/plugin/ljww360/table/table_plugin_ljwenwen_tw.php68discuz_database::result_first(%s)
4source/class/discuz/discuz_database.php117discuz_database::query(%s, Array, false, false)
5source/class/discuz/discuz_database.php136db_driver_mysql->query(%s, false, false)
6source/class/db/db_driver_mysql.php153db_driver_mysql->halt(%s, %d, %s)
7source/class/db/db_driver_mysql.php224break()
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