过JAVA编程产生一系列伪随机数，掌握平方取中法、乘同余法、混合同余法产生均匀随机数的方法。-off Java programming produce a series of pseudo-random numbers, master Mid-square method, I took with the law, mixed with the law I have Random Number method.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001082s ]
SELECT `a`.`aid`,`a`.`title`,`a`.`create_time`,`m`.`username` FROM `jrk_downrecords` `a` INNER JOIN `jrk_member` `m` ON `a`.`uid`=`m`.`id` WHERE `a`.`status` = 1 GROUP BY `a`.`aid` ORDER BY `a`.`create_time` DESC LIMIT 10 [ RunTime:0.088256s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.002630s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.008086s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001091s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003594s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001119s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003911s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.023797s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001557s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 43196 [ RunTime:0.012282s ]
