随机生成50条线段，冒泡法排序，要求排序过程可见（此乃一大软件公司招人考题）-Randomly generated 50 segments, bubble sort method require sorting process can be seen (This is a major software company attract many exam)
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001360s ]
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:0.092404s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001263s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001902s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001214s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003638s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001071s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003291s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014620s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001404s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 292312 [ RunTime:0.001264s ]
