二叉树排序实现二叉树的前序、中序、后序排列，以菜单形式出现,代码简洁、易懂易用-Binary Tree Binary Tree Sort realize the first order, in sequence, after the sequence order to the menu form, the code is simple and easy to understand and use
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001162s ]
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:0.084905s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001135s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001830s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001129s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003562s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000952s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003190s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014088s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001197s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 210349 [ RunTime:0.001457s ]
