4*4键盘扫描，lcd依据键值单行依次显示键值，一行结束后，清屏，重新显示-4* 4 keyboard scanning, lcd display based on key followed by one-way key, and his entourage after the end of the Qing-ping, re-display
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001019s ]
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:0.100336s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001399s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001964s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001456s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.005570s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001310s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.006879s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.030983s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001793s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 240518 [ RunTime:0.020629s ]
