我自己编写的分层聚类算法，类内采用最大距离，类间采用最小距离实现-myself prepared by the Hierarchical clustering algorithm, the largest category within distance between categories of use to achieve minimum distance
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001120s ]
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:0.077613s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.000921s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001180s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001371s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003273s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000762s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003343s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015276s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001213s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 116660 [ RunTime:0.016930s ]
