export and import inventory warehouse in a table - sql-server

Question

I have a table with 4 column in sql (key ID):
ID Items Import Export
1 A1 1333 0
2 A1 0 368
3 A1 0 252
4 A1 1965 0
5 A1 0 162
6 A1 0 551
7 A1 0 69
I want calculate inventory ware in a row.But not the results as expected.
You can help me get the results as below? With column Inventory
ID Items Import Export Inventory
1 A1 1333 0 1333
2 A1 0 368 965
3 A1 0 252 713
4 A1 1965 0 2678
5 A1 0 162 2516
6 A1 0 551 1965
7 A1 0 69 1896
This is my code:
Select ID,
(A.Invent + Import-Sum(Export)) as Inventory
From MyColumn,
(
Select Top 1 (Import - Export) as Invent
From MyColumn
Where Items in ('A1')
) as A
Where Items in ('A1')
Group by
A.Invent,
Import,ID

Answer 1

Being 2008 you're missing the sum() over, however there is another option
Example
Declare #YourTable Table ([ID] int,[Items] varchar(50),[Import] int,[Export] int)
Insert Into #YourTable Values
(1,'A1',1333,0)
,(2,'A1',0,368)
,(3,'A1',0,252)
,(4,'A1',1965,0)
,(5,'A1',0,162)
,(6,'A1',0,551)
,(7,'A1',0,69)
Select A.*
,B.*
from #YourTable A
Cross Apply (
Select Inventory = sum(Import-Export)
From #YourTable
Where Items=A.Items and ID<=A.ID
) B
Returns
ID Items Import Export Inventory
1 A1 1333 0 1333
2 A1 0 368 965
3 A1 0 252 713
4 A1 1965 0 2678
5 A1 0 162 2516
6 A1 0 551 1965
7 A1 0 69 1896

Answer 2

Using a join
Also window function but this is not available in 2008
declare #T table (id int identity primary key, import int, export int);
insert into #T (import, export) values
(1333, 0)
, (0, 368)
, (0, 252)
, (1965, 0)
, (0, 162)
, (0, 551)
, (0 , 69);
select t1.id, t1.import, t1.export
, sum(t2.import - t2.export) AS inven
from #T t1
join #T t2
on t2.id <= t1.id
group by t1.id, t1.import, t1.export
order by t1.id
select *
, sum(import - export) over (order by t.id) as inven
from #T t;
id import export inven
----------- ----------- ----------- -----------
1 1333 0 1333
2 0 368 965
3 0 252 713
4 1965 0 2678
5 0 162 2516
6 0 551 1965
7 0 69 1896