大部份单片机中，没有USB 主机，要读写U盘，不妨用SL811，扩展，代码OK-Most single-chip, there is no USB host, it is necessary to read and write U disk, may wish to use SL811, expansion, code OK
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001802s ]
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:0.133598s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001393s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001954s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001485s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003747s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000905s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003688s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014919s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001257s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 113032 [ RunTime:0.014658s ]
