聚类算法是基于距离的，但是大多采取单一的欧氏距离，不利于结果的发现。-clustering algorithm is based on the distance, but most of the adoption of a single Euclidean distance, is not conducive to the discovery of the results.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001289s ]
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:0.093003s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001224s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001907s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001138s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003579s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000963s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003208s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014982s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001187s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 298975 [ RunTime:0.032751s ]
