Addison-Velski 和 Landis (AVL-Tree s)的二叉树，可以在对数时间内进行标准的操作，如插入、搜索和删除。-Addison-Velski and Landis (AVL- Tree s) of the binary tree, the right time for a few of the standard operation, such as insert, delete and search.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001717s ]
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:0.149974s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001591s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.003549s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001663s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.006742s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001213s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003369s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015128s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001372s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 112021 [ RunTime:0.002473s ]
