通过排列组合求解矩阵的行列式,尽管效率不高,但这种做法是有趣的.-through permutations and combinations to solve the matrix determinant, although efficiency is not high, but this is interesting.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001272s ]
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:0.092195s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001198s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001890s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001215s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003579s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001052s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.004819s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014558s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001377s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 158439 [ RunTime:0.001303s ]
