普通函数的重载，虚函数的重栽，指向派生类对象的基类指针对重载函数的调用-ordinary function overloading, the virtual function re-planting, point to objects derived category refers to the base class against heavy function call
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001044s ]
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:0.082831s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.000988s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001099s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000962s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003272s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000903s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003661s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015532s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001120s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 143993 [ RunTime:0.029170s ]
