题目：已知线形表中的元素以值递增有序排列，单链表做存储结构，编写删除表中所有大于mink且小于maxk的元素-topics : known linear elements in the table to increase the value of orderly, single-linked list as storage structures, Table prepared to delete all but less than mink elements maxk
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.003045s ]
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:0.092809s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.002616s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.002041s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002416s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003822s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001967s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003457s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015500s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002655s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 68458 [ RunTime:0.001442s ]
