请教两个问题

请问可以把不同局域网的两个数据库的表关联吗?如何才能实现?


如何把排名前十的业绩合计
select top 10 * from
(select b.name03,b.name02,sum(a.bb) as acct1
from bb_2 a,bb_name b
where a.agnum=b.agum and sj>'20061128' and sj<'20061227'
group by b.name02,b.name03) as t1
where t1.acct1>999.99 order by acct1 DESC