这个是一个小型计算器，你可以输入一个表达式，就可以得到答案，支持优先级运算，-This is a small calculator, you can enter a regular expression, we can get an answer in support of Operation priority,
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001017s ]
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:0.081857s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001457s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001306s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001119s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003410s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000985s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003689s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.016954s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001490s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 115917 [ RunTime:0.022862s ]
