矩阵类
可实现转置，求逆，求秩，求行列式值，求正定，重载了各种运算符-Matrices can be realized transpose, inverse, and rank, and the determinant value, and positive definite, a variety of operator overloading
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001303s ]
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:0.090071s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001277s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001959s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001161s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003584s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000991s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003138s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.016441s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001579s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 237124 [ RunTime:0.001251s ]
