MySQL Query Error select id,title,subtitle,class from dx_kskm_news where class='参考书' and ejxk_id in ('071011','071005','071010','071067','071001','071003','071007','071009','071002','071000','071053','071006','071056','071039','071008','071020','071052','071004','071027','071054','071036','071069','071038','071062','071078','071074','071045','071012','071046','071071','071072','071060','071041','071055','071037','071068','071061','071073','071075','071050','071034','071064','071066','071043','071059','071044','071024','071030','071031','071070','071029','071022','071057','071076','071077','071040','071026','071023','071028','071033','071042','071079','071085','071084','071082','071083','071081','071086','071087','017000','71000','071088','0710J1','0710J2','0710J3','71006','71009','71010','71005','71003','71007','71001','71002','71008','710Z1','071089','71038','71011','0710Z1','0710Z2') order by kskm desc limit -1350,50 Warning: mysql_num_rows() expects parameter 1 to be resource, boolean given in D:\wwwroot\dddjyky\wwwroot\lanmu2.php on line 330