输入稀疏矩阵中非零的元素，然后建立整个矩阵，实现这两个矩阵相加、相减和相乘运算。
-Enter non-zero elements of sparse matrix, and then build the whole matrix, to achieve these two matrices are added together, subtraction, and multiplication operations.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001095s ]
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:0.081132s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001381s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001114s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001001s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003332s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000986s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003872s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015226s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001208s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 151384 [ RunTime:0.015626s ]
