排序是数据结构中较重要的部分，充分了解其算法的区别当然也相当重要-Sort the data structure, the more important part of a full understanding of the difference between the algorithms of course, very important
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.003558s ]
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:0.100206s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.002316s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001945s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002362s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003747s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.002085s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003510s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015391s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002759s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 304689 [ RunTime:0.001173s ]
