可以实现一些高精度，超出CPU所能一次运算的数，实现任意数值长度的运算。-Can achieve a number of high-precision, beyond the CPU can be a number of operations, realization of arbitrary length numerical computing.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001265s ]
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:0.084522s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.000997s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001232s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000989s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003017s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000851s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003722s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014191s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001112s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 237897 [ RunTime:0.015435s ]
