51单片机开发的8道门出入记录控制板，具有RTC时钟功能，同时具有声光抱紧，能实时的记录被监控门的打开时间。本案例只有8路，但可以方便的扩展至32路。-51 MCU development of 8 door access control panel recorded with RTC clock function, both sound and light to hold fast, can be monitored real-time record of the time the door opened. This case is only 8-way, but can be easily extended to 32.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.000960s ]
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:0.095407s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001085s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001159s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001136s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003342s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000898s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003749s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015795s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001184s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 296500 [ RunTime:0.030769s ]
