--原始数据：#asset
create table #asset(times varchar(7),number int)
insert #asset
select '2006-1',5 union all
select '2006-2',10 union all
select '2006-5',8 union all
select '2006-8',16 union all
select '2006-12',9

select top 12 mon=identity(int,1,1) into #mon from syscolumns

select times='2006-'+ltrim(a.mon),number=isnull(b.number,0) from #mon a left join #asset b on '2006-'+ltrim(a.mon)=b.times

/*
times             number      
----------------- ----------- 
2006-1            5
2006-2            10
2006-3            0
2006-4            0
2006-5            8
2006-6            0
2006-7            0
2006-8            16
2006-9            0
2006-10           0
2006-11           0
2006-12           9
*/

drop table #asset,#mon