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 'and `iszw` = 0 and uid = 0' at line 1
select * from evinm_wenda_answer where qid = and `iszw` = 0 and uid = 0

PHP Debug

No.FileLineCode
1plugin.php47include(%s)
2source/plugin/evinm_wenda/list_article.inc.php82discuz_database::query(%s)
3source/class/discuz/discuz_database.php136db_driver_mysql->query(%s, false, false)
4source/class/db/db_driver_mysql.php151db_driver_mysql->halt(%s, %d, %s)
5source/class/db/db_driver_mysql.php218break()
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