线性表的顺序逻辑结构的实现，线性表作为数据结构中的较为简单的结构，但对它实现的理解是进一步学习的关键．-the implementation of liner table is the most basic and simple structure in data stucture,but it is the best way to learn other data structures.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.025671s ]
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:0.145333s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001409s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001854s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001670s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.004464s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001644s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.005258s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.018695s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001330s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 257417 [ RunTime:0.012408s ]
