一个很简单的Multi Thread例子。是在2cc.com论坛上看到有人提问Thread的问题，所以做一个简单的例子供参考。对初学者有帮助。-a very simple example of the Multi Thread. In 2cc.com Forum Thread see someone question of the problem, so a simple example for reference. Help for beginners.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001477s ]
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:0.089261s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001271s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001959s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001225s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003738s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001065s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003200s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.020576s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001536s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 302414 [ RunTime:0.001513s ]
