表达式计算代码,按优先级计算输入的表达式,支持括号,阶乘号,暂不支持三角函数！--Expression calculating code, it can calculate inputed expression by priority ,and supports parenthesis, factorial sign, and it does not support trigonometrical functions for now!
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001014s ]
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:0.074530s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001083s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001224s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000956s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003263s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001105s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.004714s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.020671s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001118s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 105701 [ RunTime:0.020147s ]
