本文为电子大赛的最后提交文档，题目为简易数控直流电源，书写详细清楚，很好的参考样品-This contest final submission of electronic documents, entitled Simple NC DC power supply, writing more clear, a good reference sample
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001245s ]
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:0.087444s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001177s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.002007s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001653s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003774s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001031s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003379s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014932s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001326s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 171451 [ RunTime:0.001272s ]
