这是一个生成组合序列的程序,而且是非递归的,代码非常精简,速度很快,序列是字典序的.-This is a combination of sequence generation process, but also non- recursive, code very concise, very fast, is the sequence of lexicographic.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.003012s ]
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:0.133802s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.000933s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001146s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.003094s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003278s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001037s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003878s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.016011s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.000984s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 238130 [ RunTime:0.021405s ]
