MySQL Query Error select id,title,subtitle,class from dx_kskm_news where class='参考书' and ejxk_id in ('100100','100102','100163','100175','100101','100103','100121','100140','100157','100164','100159','100106','100104','100151','100176','100171','100192','100185','100172','100105','100162','100165','100178','100180','100188','100156','100160','100182','100174','100154','100152','100173','100155','100179','100177','100196','100197','100150','100167','100169','100166','100170','100168','100158','100161','100198','100181','100183','100186','100187','100184','100153','100190','100193','100195','100147','100194','100143','100142','100141','100146','100122','100124','1001Z7','100139','100123','100125','100138','1001J1','1001J2','100149','100202','100120','100126','1001J4') order by kskm desc limit -950,50 Warning: mysql_num_rows() expects parameter 1 to be resource, boolean given in D:\wwwroot\dddjyky\wwwroot\lanmu2.php on line 330