算法分析和设计，给出五个排序算法，然后比较五个算法的运行时间，分析算法的时间复杂度-Algorithm analysis and design, are given five sorting algorithm, and then compared the five-time algorithm to analyze the time complexity of algorithm
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001063s ]
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:0.122980s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.030066s ]
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SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001953s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.005114s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001407s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.007570s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.021855s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001829s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 179209 [ RunTime:0.016499s ]
