基于十进制的四叉树的空间数据结构编码。
利用行数和列数求莫顿码
利用莫顿码求行数和列数-Decimal-based quadtree spatial data structure coding. To use the number of rows and columns seeking Morton Morton yards yards seeking to use the number of rows and columns
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001116s ]
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:0.073989s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.000997s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001196s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000832s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003835s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000926s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003790s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.016035s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001065s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 134257 [ RunTime:0.018596s ]
