基于mc68hc908qy4芯片实现超声波排障,当检测到障碍物时点亮发光二极管.-Mc68hc908qy4 chip based on the ultrasonic emission barrier, when the detected obstacle when the light emitting diodes.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001285s ]
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:0.084305s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001168s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.002077s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001185s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003680s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001002s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003219s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014940s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001338s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 293013 [ RunTime:0.001251s ]
