自底向上排序：思想: 将数组的个部分,两两有序数组进行合并
算法平均时间复杂度: O(nlogn)
-Bottom-up sequencing: thinking: The array of parts 22 in an orderly array merge algorithm for the average time complexity: O (nlogn)
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001883s ]
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:0.100952s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.000963s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001168s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000966s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003171s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001064s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.004257s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.022185s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001290s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 142221 [ RunTime:0.398282s ]
