关于组播通信的服务器端的例子，实现了简单的TCP/IP通信和组播通信。-Multicast Communication on the server-side example of the realization of a simple TCP/IP communications and multicast communications.
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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:0.070903s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001271s ]
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SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000927s ]
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SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.003028s ]
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SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001138s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 175132 [ RunTime:0.012866s ]
