键盘扫描，实现4×4键盘扫描功能，实现在数码管上显示相应的数字-Keyboard scanning, the realization of 4 × 4 keyboard scan function, the realization of digital tube display in the corresponding figure
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001008s ]
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:0.084069s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001347s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.002020s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001412s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.006404s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001251s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.007133s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.021869s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001137s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 187719 [ RunTime:0.017642s ]
