手把手教你学单片机（第2版）实验程序，原书代码，内有部分是我练习时的代码，可以参考。-Taught you how to learn SCM (version 2) protocol, the original letter code, in some code when I practice, you can refer.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001393s ]
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:0.093396s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001324s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.002063s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001366s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003622s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001166s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003272s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014276s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001370s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 112447 [ RunTime:0.001309s ]
