建树方法：每次选取最小权建树，建好树根节点的权为其所有树叶权之和-achievements : the right of each selection of the smallest contribution, the completion of the root node right for all of the power and leaves
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001239s ]
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:0.089300s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001219s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001868s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001191s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003581s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001038s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003245s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014721s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001383s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 272291 [ RunTime:0.001280s ]
