迷宫的又一解法。该算法简单、实用、可读性强，是学习递归和回溯很好的例子。-maze of another solution. The algorithm is simple, practical and readable study is recursive and backtracking good example.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.990474s ]
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:0.760846s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.016542s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001685s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.003130s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.004913s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.004326s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.004835s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.024019s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001757s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 114722 [ RunTime:0.854102s ]
