课互传多种格式的文件，如电影、图片、文档。还可以发送组播消息，是可靠的网络传输工具。
-Classes to each other in multiple formats of documents, such as movies, pictures, documents. Can also send multicast message, is a reliable tool for network transmission.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001352s ]
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:0.093406s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001259s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.002107s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001284s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003674s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001078s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003260s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015261s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001457s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 138285 [ RunTime:0.001519s ]
