SQL语句错误： SELECT * FROM wkcx_content WHERE cat_id= and img_thumb!='' and xianshi='1' ORDER BY news_order ASC,add_time DESC limit 0,1
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 img_thumb!='' and xianshi='1' ORDER BY news_order ASC,add_time DESC limit 0' at line 1