MySQL Query Error select id,title,subtitle,class from dx_kskm_news where class='参考书' and kskm in ('101思想政治理论','204英语二','302数学二','408计算机学科专业基础综合','841密码专业基础','819计算机专业基础','611数学分析','824高等代数','817专业基础综合','201英语一','301数学一','820计算机专业基础','834应用密码学','811数据结构','873数据结构','887概率论与数理统计','303数学三','823数据结构','830算法与数据结构','802近世代数','804密码学基础','893网络空间安全基础综合','830密码学基础') order by kskm desc limit -700,50 Warning: mysql_num_rows() expects parameter 1 to be resource, boolean given in D:\wwwroot\dddjyky\wwwroot\lanmu.php on line 331
