51单片机键盘的相关处理，按键扫描，后针对具体应用进行相应处理．-51 Single-chip related deal with the keyboard, keypad scanning, after the specific application of the corresponding treatment.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001445s ]
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:0.109611s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001171s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001873s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001243s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003696s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001199s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.005793s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.018269s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001572s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 180175 [ RunTime:0.001545s ]
