这是一个k均值聚类的VC函数，非常有用，是本人亲自编写，为了能够和别人交换代码，忍痛上传。-This is a k-means clustering function of the VC very useful, I personally prepared. , and others in order to exchange code and reluctantly upload.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001838s ]
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:0.096559s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001039s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001114s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001093s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.022256s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001056s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003720s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015201s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001199s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 171773 [ RunTime:0.031840s ]
