简单的计算器，实现了最基础的加减乘除和平方等数学运算的一个小程序-Simple calculator, to achieve the most basic addition and subtraction, multiplication and division and square, such as a small mathematical procedures
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001451s ]
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:0.082425s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001086s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001254s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001088s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003020s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000908s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003444s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014817s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001399s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 116438 [ RunTime:0.019297s ]
