VB环境下PLC和上位机通信的实现
关键词：上位机；MSComm通信；可编程控制器-VB environment PLC and PC communication to achieve Keywords: PC MSComm communication programmable logic controller
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001260s ]
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:0.095750s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001314s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.002077s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001278s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003622s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001147s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003240s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015271s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001517s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 163096 [ RunTime:0.001510s ]
