刚才从VeryCD的会员中随机抽取了200名幸运者，每人赠送50条短讯。
主要用了 ORDER BY RAND() 这个 mysql 的随机排序功能来实现了此效果。
现在将用于随机抽取的sql语句贴出，以示公平:
SQL
SELECT `name` , `email`
FROM `dash_forum_members` WHERE `warn_level` <1 AND `last_post` >1105417965 AND (
`mgroup` =3 OR `mgroup` =16
)
ORDER BY RAND( )
LIMIT 0, 200
FROM `dash_forum_members` WHERE `warn_level` <1 AND `last_post` >1105417965 AND (
`mgroup` =3 OR `mgroup` =16
)
ORDER BY RAND( )
LIMIT 0, 200