4*4键盘扫描，依据键值，LCD双行显示，双行显示满后，清屏，重新显示-4* 4 keyboard scanning, based on keys, LCD double display, double line after the expiry of the Qing-ping, re-display
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001642s ]
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:0.117806s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001052s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001451s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001019s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003530s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000986s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.004674s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.017470s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001238s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 240521 [ RunTime:0.016907s ]
