这个是用于求解线性方程组的代码，可以供初学者参考，功能不错，比较完善-This is used to solve linear equations of the code, you can reference for beginners, function well, relatively perfect
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001361s ]
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:0.093148s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001216s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001885s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001228s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003633s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001089s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003787s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015021s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001366s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 186237 [ RunTime:0.001215s ]
