1．定义数据结构。
2．编写函数，实现插入排序算法。
3．编写函数，实现希尔排序或快速排序等效率较高的算法。-1. Defined data structure. 2. Write a function to achieve insertion sort algorithm. 3. Write a function to achieve Hill sort or quick sort, etc. more efficient algorithms.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001978s ]
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:0.093110s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001225s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001490s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002242s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.006225s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001569s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.007485s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.023921s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001845s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 203565 [ RunTime:0.014181s ]
