该文件是关于采样和量化的一些资料，对于加深采样量化概念的理解具有一定的参考价值。-The document is on the sampling and quantification of some of the information, for better understanding of the concept of sampling to quantify a certain reference value.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001969s ]
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:0.088983s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.002449s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001947s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002198s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003803s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001938s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003258s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015160s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002478s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 190577 [ RunTime:0.001366s ]
