基于等精度测频原理，设计的等精度频率计，测试结果很精确，达到0.01HZ。-Such as the accuracy of frequency measurement based on the principle of design, such as precision frequency meter, test results are accurate to 0.01HZ.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001376s ]
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:0.085860s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001279s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001999s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001176s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.004374s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001010s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003207s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.019799s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001457s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 134222 [ RunTime:0.001234s ]
