MySQL Query Error select id,title,subtitle,class from dx_kskm_news where class='参考书' and ejxk_id in ('120201','120202','120279','120204','120203','120200','120225','120243','120263','120268','120227','120261','120232','120228','120231','120236','120246','120234','120277','120245','120276','120274','120254','120289','120256','120238','120221','120287','120283','120286','120266','120258','120269','120253','120255','120264','120230','120251','120280','120281','120252','120226','120224','120241','120249','120262','120288','120257','120271','120282','120235','120275','120278','120285','120250','120260','120273','120239','120265','120284','120270','120237','120272','120240','120290','120218','120292','1202J5','120219','120216','120217','120205','120294','120291','120293','1202J1','1202Z2','1202J3') order by kskm desc limit -1000,50 Warning: mysql_num_rows() expects parameter 1 to be resource, boolean given in D:\wwwroot\dddjyky\wwwroot\lanmu2.php on line 330