这是我学习数据结构与算法的时候编的双向链表的操作，对学习数据结构与算法的朋友有帮助-This my learning algorithm and data structure of the time series of the two-way linked list, the operation of the learning algorithm and data structure of friends to help! !
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001976s ]
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:0.100266s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001140s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001285s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001138s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003605s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001336s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.004225s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015093s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001087s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 312601 [ RunTime:0.012425s ]
