单片机AT89S52控制MFRC500以及MAX485实现读取IC卡信息和多机通信功能-Single-chip AT89S52 control MFRC500 and IC card reader to achieve MAX485 information and multi-machine communication
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001410s ]
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:0.088552s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001328s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001937s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001276s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003665s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001117s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003354s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015953s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001539s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 206727 [ RunTime:0.001521s ]
