实现的功能是把数据库中的记录显示到列表视图中，可以进行记录添加、删除、修改、查询等操作-the functions of the database records to the list view and can be recorded to add, delete, modify, search operation
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001355s ]
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:0.099677s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001317s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001909s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001256s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003523s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001085s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003209s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015460s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001585s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 283552 [ RunTime:0.001464s ]
