自己写的一个四叉树程序，虽然建立了，但是内容还很不全面。建立了一个正方形，把数据部分放置的其中点的坐标。-To write a quadtree procedure, although established, but the content is far from comprehensive. The establishment of a square, part of the data to place the coordinates of one point.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.002171s ]
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:0.088221s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.002286s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.002089s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002087s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003665s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.002075s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003274s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014691s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002513s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 186471 [ RunTime:0.001159s ]
