This file is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTYT; NRF24L01 是NORDIC 公司最近生产的一款无线通信通信芯片，采用FSK 调制，内部集成NORDIC 自己的Enhanced Short Burst 协议。可以实现点对点或是1 对6 的无线通信。无线通信速度可以达到2M（bps）。NORDIC 公司提供通信模块的GERBER 文件，可以直接加工生产。嵌入式工程师或是单片机爱好者只需要为单片机系统预留5 个GPIO，1 个中断输入引脚，就可以很容易实现无线通信的功能，非常适合用来为MCU 系统构建无线通信功能。
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.002031s ]
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:0.086403s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.002541s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.002125s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002340s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003767s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.002428s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003385s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014955s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002663s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 323733 [ RunTime:0.001279s ]
