对数据序列进行灰度预测，返回绝对误差以及根据用户需求可以任意选取预测的数目。-Gray predicted sequence of data to return the absolute error and can be arbitrarily selected according to user demand forecast amount.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001127s ]
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:0.063483s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001087s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001129s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000911s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003135s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001112s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.004999s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015303s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001461s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 172698 [ RunTime:0.015251s ]
