create table a (id int,name nvarchar(32),out_date date)
go
insert a select 1,'电视1','2012-02-01' union all
select 2,'电视1','2012-03-20' union all
select 3,'电视1','2012-02-06' union all
select 4,'电视2','2012-02-23'
 
 create table b (id int,name nvarchar(32),price money,ord_date date)
 go
 insert b select 1,'电视1',3500,'2011-04-12' union all
select 2,'电视1',3000 ,'2011-12-21' union all
select 3,'电视1',2800 ,'2012-03-04' union all
select 4,'电视1',4000,'2012-1-16' 
 
select a.name,prices=(select top 1 price from b where out_date>ord_date order by ord_date desc),out_date
from a
 /*
 name    prices    out_date
电视1    4000.00    2012-02-01
电视1    2800.00    2012-03-20
电视1    4000.00    2012-02-06
电视2    4000.00    2012-02-23
*/