矩阵类，可实现矩阵的各种运算，包括加减乘除、求逆等。-Matrices can realize a variety of matrix operations, including multiplication and division addition and subtraction, inversion and so on.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001367s ]
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:0.090772s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001247s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001878s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001242s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003646s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001061s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003314s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014478s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001268s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 147371 [ RunTime:0.001317s ]
