SQL calculation based on another column - sql

Question

I am extracting data out of SQL database and need to calculate the opening balance of a stock item per project. I am getting the opening balance for the stock inclusive of all the projects.
item code | Project | Qty In | Qty Out
----------+---------+--------+---------
1234 1 0 90
1234 1 90 0
1234 2 431 0
1234 2 0 22
1234 3 925 0
1234 3 0 925
1234 3 925 0
1234 3 0 20
1234 3 0 40
1234 3 0 30
1234 3 0 40
1234 3 0 60
1234 3 0 50
1234 3 0 24
1234 3 0 40
1234 3 0 30
1234 3 0 17
1234 3 0 80
1234 3 0 30
1234 4 16 0
1234 4 0 16
1234 5 22 0
1234 5 0 23
Query:
select OpeningBalanceQty = Qty_On_Hand +
(select case when ServiceItem = 0
then IsNull(sum (QtyOut), 0)
else 0
end
from table1
where AccountLink=StockLink and txdate>='2016-06-01' and project ='2' ) -
(select case when ServiceItem = 0
then IsNull(sum (QtyIn), 0)
else 0
end from table1
where AccountLink=StockLink and txdate>='2016-06-01' and project ='2')
from tablel join table2 on table1.AccountLink = table2.StockLink
I have used project 2 as an example, it has two transactions(qty in:431)& (qty out:22)
My opening balance should be 409 but it is giving the total for the product item
My full code:
select Table1.TxDate,Table2.Pack,Table1.Reference,
OpeningBalanceQty= (select case when ServiceItem = 0 then IsNull(sum
(QtyOut), 0) else 0 end from Table1 where AccountLink=StockLink and
ProjectCode in('2') ) - (select case when ServiceItem = 0 then IsNull(sum
(QtyIn), 0) else 0 end from Table1 where AccountLink=StockLink and
ProjectCode in('2'))
,ProjectCode,ProjectDescription, Code, Description_1, Sum(ActualQuantity)*-1
as [Qty Processed],Sum(Debit)-Sum(Credit) as [Value],Trcode
from Table1
join Table2
on Table1 .AccountLink = Table2.StockLink
where ServiceItem = 0 and txdate>='2017-06-01 00:00:00' and txdate<='2017-
06-30 00:00:00' and Code='1234'
Group by Description_1, Code,ProjectCode, ProjectDescription, stocklink,
serviceitem,Qty_On_Hand,Table1.Reference,Table2.Pack,Table1.TxDate,trcode

Answer 1

Do you think this could be helpful for you?
SELECT PROJECT, SUM( QTYIN-QTYOUT) AS OPEN_BAL_QTY
FROM yourtable
WHERE txdate>='2016-06-01'
GROUP BY PROJECT
Output:
PROJECT OPEN_BAL_QTY
1 0
2 409
3 464
4 0
5 -1
1° update: after your new information (pls, next time, try to give all the information in your initial post, and well formatted: see tour of stackoverflow to learn how to do).
If you are using MSSQL 2005 or later, you can try this:
SELECT TABLE1.TXDATE
,TABLE2.PACK
,TABLE1.REFERENCE
, SUM(QTYIN-QTYOUT) OVER (PARTITION BY TABLE1.PROJECTCODE) AS OPEN_BAL_QTY
,PROJECTCODE
,PROJECTDESCRIPTION
,CODE
,DESCRIPTION_1
,-SUM(ACTUALQUANTITY) AS QTY PROCESSED
, SUM(DEBIT) - SUM(CREDIT) AS VALUE
,TRCODE
FROM TABLE1
JOIN TABLE2 ON TABLE1.ACCOUNTLINK = TABLE2.STOCKLINK
WHERE SERVICEITEM = 0
AND TXDATE >= '2017-06-01 00:00:00'
AND TXDATE <= '2017-06-30 00:00:00'
AND CODE = '1234'
GROUP BY DESCRIPTION_1
,CODE
,PROJECTCODE
,PROJECTDESCRIPTION
,STOCKLINK
,SERVICEITEM
,QTY_ON_HAND
,TABLE1.REFERENCE
,TABLE2.PACK
,TABLE1.TXDATE
,TRCODE
2° update
If it doesn't work for you, you should try:
SELECT A.*
,B.OPEN_BAL_QTY
FROM
SELECT TABLE1.TXDATE
,TABLE2.PACK
,TABLE1.REFERENCE
,PROJECTCODE
,PROJECTDESCRIPTION
,CODE
,DESCRIPTION_1
,-SUM(ACTUALQUANTITY) AS QTY PROCESSED
, SUM(DEBIT) - SUM(CREDIT) AS VALUE
,TRCODE
FROM TABLE1
JOIN TABLE2 ON TABLE1.ACCOUNTLINK = TABLE2.STOCKLINK
WHERE SERVICEITEM = 0
AND TXDATE >= '2017-06-01 00:00:00'
AND TXDATE <= '2017-06-30 00:00:00'
AND CODE = '1234'
GROUP BY DESCRIPTION_1
,CODE
,PROJECTCODE
,PROJECTDESCRIPTION
,STOCKLINK
,SERVICEITEM
,QTY_ON_HAND
,TABLE1.REFERENCE
,TABLE2.PACK
,TABLE1.TXDATE
,TRCODE
) A
LEFT JOIN (SELECT PROJECTCODE, SUM( QTYIN-QTYOUT) AS OPEN_BAL_QTY
FROM TABLE1
WHERE TXDATE>='2017-06-01'
AND TXDATE <= '2017-06-30 00:00:00'
GROUP BY PROJECT) B ON A.PROJECT_CODE = B.PROJECT_CODE