Problem in fetching data by using loop.

Question

Hello Friends,
i have to create one report based upon item wise.
Based upon item wise i have displayed Total stock qty and
then item wise GRPO details with Qty data.
I have created Stored procedure for this.
Now i have kept one column RestQty which is basically used to
display rest quantity based upon the data of Total Stock Qty and GRPO quantity.
To Implement this logic i have used loop condition but its not returning correct
qty on Rest Qty column.
Rest Qty should work like this:-
Item aaaaa
If Total Quantity = 28
GRPO Quantity = 40(First GRPO Qty),
          7(second last GRPO Qty), &
          3 (Last GRPO Quantity)
Now Total quantity always first check with Last GRPo Qty,
it means 28 > 3 then 3 comes to Rest Qty col.
then Total quantity check with second Last GRPo Qty,
it means 28 > 7 + 3(Last GRPo Qty) then 7 comes to Rest qty col.
then Total quantity first check with first GRPo Qty,
it means 28 > 40(first grpo qty) + 7 + 3, its not satisfied,
hence it should display 28 - (7+3) = 18 in rest qty col.
if we sum Rest qty column for Item aaaa then it should equal to Total Qty for particular item.
so its should work for Item aaaa, based upon this other items should work like this.
so i only need to correct the data of Rest Qty col, other are ok.
Please help me to correct this query.
Regards,

Answer 1

SELECT OITM.ItemCode,OITM.ItemName,sum(OITW.onhand) as onhand,abc.basenum as GRPONo, abc.docdate as GRPODate,
(select top 1 docrate from opdn where docentry = abc.baseentry and docnum = abc.basenum) as GRPORate,
(select  sum(quantity) from pdn1 where docentry = abc.baseentry and abc.itemcode = itemcode) As GRPOQty,null,
(select top 1 price from pdn1 where docentry = abc.baseentry and abc.itemcode = itemcode) As GRPOUnitPrice,
(select distinct top 1 opch.docnum from opch inner join pch1 on opch.docentry = pch1.docentry
where pch1.baseentry = abc.baseentry) as APInvNo,
(select distinct top 1 opch.docdate from opch inner join pch1 on opch.docentry = pch1.docentry
where pch1.baseentry = abc.baseentry) as APInvDt,
(select distinct top 1 opch.u_dodamt from opch inner join pch1 on opch.docentry = pch1.docentry
where pch1.baseentry = abc.baseentry) as APInvDocRate
FROM OITW
INNER JOIN OITM ON OITW.ItemCode = OITM.ItemCode
INNER JOIN OITB ON OITM.ItmsGrpCod = OITB.ItmsGrpCod
left join sri1 as abc on OITW.ItemCode = abc.ItemCode
WHERE(OITW.OnHand <> 0 Or oitw.iscommited <> 0 Or oitw.onorder <> 0 Or oitw.minstock <> 0)
AND (OITW.ItemCode IN (SELECT pdn1.ItemCode FROM Opdn
inner join pdn1 on opdn.docentry = pdn1.docentry
where opdn.series = 314 or opdn.series = 94 or opdn.series = 663))and (abc.Direction = 0)
AND (abc.LineNum =(SELECT MAX(LineNum) AS Expr1 FROM  SRI1
WHERE (ItemCode = abc.ItemCode) AND (SysSerial = abc.SysSerial))) AND basetype = 20
and abc.docdate >= (@FromDate) and abc.docdate <= (@ToDate)
group by OITM.ItemCode,OITM.ItemName, oitm.suppcatnum,
abc.basenum, abc.sysserial, abc.baseentry, abc.basenum, abc.docdate,
oitm.ItmsGrpcod, oitb.ItmsGrpNam, abc.baseentry, abc.SysSerial, abc.ItemCode,oitw.itemcode
order by OITM.ItemName,abc.basenum