全选主元高斯消去法agaus.c--返回零表示原方程组的系数矩阵奇异，返回的标志值不为零，则表示正常返回。-entire election PCA Gaussian Elimination agaus.c--return to the original equation is expressed by the coefficient matrix, a sign of the return value is not zero, then returned to normal.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.000991s ]
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:0.068972s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.000942s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001166s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000953s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003238s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000924s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003906s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.021292s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001120s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 128100 [ RunTime:0.020912s ]
