我正在尝试计算一个月内产品的总销售额,但我希望它包括任何“空”月(没有销售),只选择最近12个月。
到目前为止,这是我的代码。
declare
@ProductNo int
set @ProductNo = 1234
SELECT
YEAR(o.OrderDate) as 'Year', MONTH(o.OrderDate) as 'Month', sum(Amount) as 'Units sold',[ProductNo]
FROM [OrderLine] ol
inner join [Order] o on ol.OrderNo = o.OrderNo
where ProductNo = @ProductNo
Group by ProductNo, YEAR(o.OrderDate), Month(o.OrderDate)
Order by ProductNo, YEAR(o.OrderDate), Month(o.OrderDate)
返回
Year Month Units sold
2011 6 2
2011 10 1
2011 11 1
2012 2 1
但我希望它能够回归。
Year Month Units sold
2011 4 0
2011 5 0
2011 6 2
2011 7 0
2011 8 0
2011 9 0
2011 10 1
2011 11 1
2011 12 0
2012 1 0
2012 2 2
2012 3 0
我正在使用SQL Server 2008 R2 Sp1
答案 0 :(得分:2)
在我知道你有日历表之前我已经完成了。我已经使用master.dbo.spt_values
连续十二个月生成(包括当前)。
declare @ProductNo int
set @ProductNo = 1234
select MONTH(d.date), YEAR(d.date), isnull(t.amnt, 0) as [Units sold] from (
SELECT
YEAR(o.OrderDate) as 'Year',
MONTH(o.OrderDate) as 'Month',
sum(Amount) as amnt,
[ProductNo]
FROM [OrderLine] ol
inner join [Order] o on ol.OrderNo = o.OrderNo
where ProductNo = @ProductNo
group by ProductNo, YEAR(o.OrderDate), Month(o.OrderDate)
) t
right join (
select dateadd(mm, -number, getdate()) as date
from master.dbo.spt_values
where type = 'p' and number < 12
) d on year(d.date) = t.[year] and month(d.date) = t.[month]
order by YEAR(d.date), MONTH(d.date)
答案 1 :(得分:1)
尝试:
;with CTE as
(select 0 months_ago union all
select months_ago - 1 months_ago from CTE where months_ago > -11),
month_list as
(select dateadd(MONTH,
months_ago,
dateadd(DAY,
1-datepart(DAY,getdate()),
cast(GETDATE() as DATE))) month_start
from cte)
SELECT YEAR(ml.start_date) as 'Year',
MONTH(ml.start_date) as 'Month',
sum(Amount) as 'Units sold',[ProductNo]
FROM month_list ml
left join [Order] o
on o.OrderDate >= ml.start_date and
o.OrderDate < dateadd(MONTH, 1, ml.start_date)
left join [OrderLine] ol
on ol.OrderNo = o.OrderNo and ProductNo = @ProductNo
Group by ProductNo, YEAR(ml.start_date), Month(ml.start_date)
Order by ProductNo, YEAR(ml.start_date), Month(ml.start_date)