用vb写的有关科学计算方面的，包括求最大值，积分，统计，概率，矩阵运算等-used to write the relevant scientific computing, including seeking maximum points, statistics, probability, matrix operations, etc.
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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:0.129417s ]
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SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002599s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.005591s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001392s ]
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SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001222s ]
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