实现B-树的创建、插入、删除、遍历等功能，并以层序方式通过程序台显示输出。-B-tree to achieve the creation, insertion, deletion, traversal functions, and to sequence through the procedure showed that the output of Taiwan.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.002425s ]
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:0.104056s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.002722s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.003288s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002831s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.005224s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.002828s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.004007s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.017472s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.004207s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 279760 [ RunTime:0.004015s ]
