为满足公司需求，我写了几个封装类，包括数据库常用操作封装、串口类的封装。-In order to meet company needs, I wrote several package categories, including the database used to operate package, serial type of package.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.002129s ]
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:0.088673s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.003136s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.002098s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.003131s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.004909s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.002019s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003237s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014803s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002390s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 225728 [ RunTime:0.001194s ]
