具有基本的加、减、乘、除算术运算能力，可带有计算函数的扩充功能-Have a basic add, subtract, multiply, with the exception of arithmetic ability to function can be calculated with the expansion of functions
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001054s ]
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:0.085653s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.000939s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001134s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001092s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003193s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000949s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003788s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015323s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001127s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 280651 [ RunTime:0.021831s ]
