这个是我写的一个用PID控制水温的小程序，对刚开始接触PID的朋友有点帮助-This is what I wrote a little with the temperature of PID control procedures on the PID s friends just came into contact with a little help
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001457s ]
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:0.096935s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001266s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001911s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001338s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003605s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001121s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003241s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014479s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001321s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 142935 [ RunTime:0.001229s ]
