单片机C51控制,实时时钟程序,单片机掉电后重新启动仍能准确显示时间-C51 single-chip control, real-time clock procedures, single-chip power-down after the restart time can accurately show
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001941s ]
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:0.087882s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.002219s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.002243s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002160s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003668s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.002002s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003452s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015188s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002366s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 186593 [ RunTime:0.001211s ]