MySQL Query Error select id,title,subtitle,class from dx_kskm_news where class='参考书' and ejxk_id in ('080201','080202','080203','080204','080200','080270','080257','080259','080285','080251','080264','080292','080222','080297','080296','080298','080261','080281','080265','080220','080291','080273','080284','080253','080250','080274','080263','080275','080277','080287','080294','080286','080278','080280','080288','080224','080256','080295','080255','080221','080223','080283','080260','080269','080279','080254','080282','080226','080299','080225','080234','080229','080231','080230','080232','0802J1','080233','0802J6','80200','0802J3','0802J2','0802J4','0802Z3','0802Z4','0802Z5') order by kskm desc limit -1150,50 Warning: mysql_num_rows() expects parameter 1 to be resource, boolean given in D:\wwwroot\dddjyky\wwwroot\lanmu2.php on line 330