MySQL Query Error select id,title,subtitle,class from dx_kskm_news where class='参考书' and ejxk_id in ('040102','040168','040175','040101','040104','040105','040106','040100','040110','040111','040182','040103','040107','040108','040109','040155','040184','040167','040179','040187','040153','040164','040178','040170','040152','040161','040154','040159','040156','040173','040150','040165','040181','040157','040177','040163','040172','040171','040188','040189','040176','040160','040158','040140','040120','040197','040199','040180','040190','040192','040198','040194','040193','040196','040121','040144','040143','040195','040119','040141','040142','040118','0401J6','0401J1','40101','40102','40106','40107','40110','40168','40187','40119','40165','40109','0401Z3') order by kskm desc limit -1600,50 Warning: mysql_num_rows() expects parameter 1 to be resource, boolean given in D:\wwwroot\dddjyky\wwwroot\lanmu2.php on line 330