步骤：
1.从表中查询数据，进行按月分组。
2.与临时表关联
Create table tb(日期 Varchar(10),时间 Varchar(10),价格 float)
insert tb values(\'2009-01-01\',\'02:00:00\',\'12.55\')
insert tb values(\'2009-02-22\',\'02:00:00\',\'26.55\')
insert tb values(\'2009-01-22\',\'04:00:00\',\'10.52\')
insert tb values(\'2009-02-22\',\'06:00:00\',\'23.55\')
insert tb values(\'2009-03-22\',\'08:00:00\',\'52.65\')
insert tb values(\'2009-04-22\',\'10:00:00\',\'23.21\')
insert tb values(\'2009-05-22\',\'12:00:00\',\'32.55\')
insert tb values(\'2009-06-22\',\'14:00:00\',\'15.54\')
insert tb values(\'2009-01-22\',\'16:00:00\',\'18.44\')
insert tb values(\'2009-02-22\',\'18:00:00\',\'20.10\')
insert tb values(\'2009-03-22\',\'20:00:00\',\'34.48\')
insert tb values(\'2009-04-22\',\'22:00:00\',\'18.55\')
insert tb values(\'2010-05-23\',\'00:00:00\',\'42.51\')
insert tb values(\'2010-05-23\',\'02:00:00\',\'36.64\')
insert tb values(\'2011-05-23\',\'04:00:00\',\'66.22\')
insert tb values(\'2012-05-23\',\'06:00:00\',\'54.41\')
select 日期,avg(价格) as 平均价格 from tb Group by 日期
GO
create proc wsp
@year int
as
declare @i int
set @i=1
--当前年1-12月表
declare @t table (dt varchar(10))
while @i<=12
begin
if @i<10
insert @t values(cast(@year as char(4))+\'-0\'+cast(@i as varchar))
else
insert @t values(cast(@year as char(4))+\'-\'+cast(@i as varchar))
set @i=@i+1
end
--和临时表关联
select b.dt,ISNULL(tt.价格,0) as价格 from
(
select CONVERT(VARCHAR(7),aa.日期,120) as 日期,SUM(aa.价格) as 价格
from tb as aa group by CONVERT(VARCHAR(7),aa.日期,120)
) as tt right join @t as b on tt.日期=b.dt
union all
select f1= \'总计\' , sum(价格) 价格 from tb where year(tb.日期)=@year
go
--执行
exec wsp 2009