制作线程竞赛的实例。运行该程序时，能够产生一个带有三个跑道的界面，有三个黄色的圆形在竞赛谁跑得最快，到达终点后，程序结束运行。-threads contest produced examples. Run this program, to have a runway with three interfaces, three yellow circle in the competition, who ran the fastest arrival, the end of the program running.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001479s ]
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:0.080250s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001150s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001332s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001077s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003408s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001063s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003881s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015924s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001297s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 242712 [ RunTime:0.016393s ]
