实现栈，队列，链表的简单操作，其中链表包括单链表，双链表，循环链表。-The realization of stacks, queues, linked list of simple operations, which include single-list list, double-linked list, circular list.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001425s ]
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:0.088602s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001189s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001941s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001169s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003723s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000998s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003382s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014738s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001306s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 282242 [ RunTime:0.004190s ]
