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:0.009529s ]
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:0.101935s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.002492s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.002283s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002402s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.004110s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.002285s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.004323s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015128s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002226s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 237897 [ RunTime:0.001325s ]
