很好用的串口类，可以以块的方式发送，可以以块的方式接收，而且可以一个一个字符的接收-good use of Serial category, to be sent to the block, the block can receive, but a character can be a receiver
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001408s ]
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:0.091966s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001009s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001169s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001032s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003344s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000920s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003762s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015385s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001150s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 308378 [ RunTime:0.019312s ]
