自定义的智能指针类，可是多个指针共用对象，且不会造成内存泄露的问题-since the definition of smart pointer types, but a number of indicators shared object, and it will not disclose the cause memory problems
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001615s ]
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:0.090682s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001264s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.002127s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001254s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003564s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001064s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003387s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.018632s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001651s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 193595 [ RunTime:0.001579s ]
