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:0.001146s ]
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:0.115078s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.000964s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001913s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001307s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003940s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000902s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.004670s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014902s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001146s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 206727 [ RunTime:0.028997s ]
