以十字链表表示稀疏矩阵,实现两个矩阵的相加,相减,和相乘的运算.-List said with a crossbow sparse matrix, the matrix to achieve two together, subtraction, multiplication and arithmetic.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001226s ]
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:0.079420s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.000958s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001130s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000906s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003046s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000978s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003894s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.023221s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001591s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 190494 [ RunTime:0.012708s ]
