计算器能够实现加、减、乘、除简单运算，还能够实现数据的输入，输出，计算，显示及程序退出等功能-calculators can be achieved, plus or minus, multiplication and simple operation, but also to achieve the data input and output, calculation, Display and exit procedures, and other functions
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.002113s ]
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:0.091860s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001854s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001968s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002677s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003985s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.002046s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003240s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015095s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002542s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 267916 [ RunTime:0.001131s ]
