二叉树遍历 包括先序遍历 中序遍历 后序遍历 求结点个数 求树的深度-Including the first order binary tree traversal traversal sequence in order to postorder traversal node number and ask for the depth of
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.006403s ]
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:0.083736s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001221s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001300s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001188s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003353s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001006s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.007721s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.023714s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001704s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 319671 [ RunTime:0.064874s ]
