ping指令详解, c语言编写，适用于pc机，稍加修改就可以移植到嵌入式系统中。-Detailed ping command, c language, applicable to pc machine, a little modification can be ported to embedded systems.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001196s ]
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:0.086231s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001132s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001835s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001236s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003544s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000952s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003120s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015279s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001321s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 301874 [ RunTime:0.001218s ]
