这是一个简易计算器，可以实现基本计算功能，例如加，减，乘，除，以及一些简单的科学计算功能-This is a simple calculator, you can achieve the basic computing functions, such as add, subtract, multiply, divide, as well as some simple function of scientific computing. .
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001431s ]
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:0.096061s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001360s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001935s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001512s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003966s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001150s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003264s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014568s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001533s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 312677 [ RunTime:0.001287s ]
