单片机实验，实现双字节无符号数的加法，利用查表指令，在此基础上可以学习查表指令的用法-SCM experiment, to achieve double-byte unsigned number of addition, using look-up table instructions, on this basis, can learn the usage of table look-up instruction
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001298s ]
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:0.089730s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001338s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001970s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001255s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003739s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001056s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003203s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014356s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001415s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 244554 [ RunTime:0.001262s ]
