可以实现矩阵行列式的任意变换，求任意向量的极大无关组，齐次非齐次线性方程组的求解-Can achieve an arbitrary transformation matrix determinant, find great vector independent of any group, homogeneous non-homogeneous linear equations to solve, etc.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001637s ]
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:0.136187s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001086s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001187s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001039s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003183s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001054s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003857s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.016017s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001308s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 160868 [ RunTime:0.014909s ]
