此函数的功能是依次选出两个小的数，不要求原来数组中的数按大小顺序排列。-The function of this function are followed by two smaller number of elected and does not require a number of the original array by the size of order.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001007s ]
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:0.094306s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001065s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001261s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000940s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003242s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000902s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003978s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.016050s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001137s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 132678 [ RunTime:0.076150s ]
