FIFO Balance at every month end with sql - sql

Question

I am trying to get the balance quantity at the end of every month i.e. running total at every month end with FIFO only but its not showing any result. Pls help
Here is my query.
declare #Stock table (Item char(3) not null,Date date not null,TxnType varchar(3) not null,Qty int not null,Price decimal(10,2) null)
insert into #Stock(Item , [Date] , TxnType, Qty, Price) values
('ABC','20120401','IN', 200, 750.00),
('ABC','20120402','OUT', 100 ,null ),
('ABC','20120403','IN', 50, 700.00),
('ABC','20120404','IN', 75, 800.00),
('ABC','20120405','OUT', 175, null ),
('XYZ','20120406','IN', 150, 350.00),
('XYZ','20120407','OUT', 120 ,null ),
('XYZ','20120408','OUT', 10 ,null ),
('XYZ','20120409','IN', 90, 340.00),
('ABC','20120510','IN', 200, 750.00),
('ABC','20120511','OUT', 100 ,null ),
('ABC','20120512','IN', 50, 700.00),
('ABC','20120513','IN', 75, 800.00),
('ABC','20120514','OUT', 175, null ),
('XYZ','20120515','IN', 150, 350.00),
('XYZ','20120516','OUT', 120 ,null ),
('XYZ','20120517','OUT', 10 ,null ),
('XYZ','20120518','IN', 90, 340.00);
;WITH OrderedIn as (
select *,ROW_NUMBER() OVER (PARTITION BY month(date) ORDER BY DATE) as rn
from #Stock
where TxnType = 'IN'
), RunningTotals as (
select Item,Qty,Price,Qty as Total,0 as PrevTotal,rn from OrderedIn where rn = 1
union all
select rt.Item,oi.Qty,oi.Price,rt.Total + oi.Qty,rt.Total,oi.rn
from
RunningTotals rt
inner join
OrderedIn oi
on
rt.Item = oi.Item and
rt.rn = oi.rn - 1
), TotalOut as (
select Item,SUM(Qty) as Qty from #Stock where TxnType='OUT' group by Item
)
select
rt.Item,SUM(CASE WHEN PrevTotal > out.Qty THEN rt.Qty ELSE rt.Total - out.Qty END * Price)
from
RunningTotals rt
inner join
TotalOut out
on
rt.Item = out.Item
where
rt.Total > out.Qty
group by rt.Item
Output
Month Item (No column name(qty*price))
4 ABC 40000
4 XYZ 37600
5 ABC 77500
5 XYZ 76100

Answer 1

With you sample data.Are you looking for this,else clearly sketch your desired output .
;WITH CTE AS
(
select Item ,[Date] ,TxnType ,s.Qty
,Price ,ROW_NUMBER() OVER (PARTITION BY month(date),TxnType ORDER BY DATE) as rn
from #Stock S
)
,
CTE1 AS
(
SELECT ITEM ,[DATE] ,TXNTYPE ,QTY,MONTH(DATE) MONTHDT,RN FROM CTE WHERE RN=1
UNION ALL
SELECT S.ITEM ,S.[DATE] ,S.TXNTYPE ,S.QTY+A.QTY,A.MONTHDT ,S.RN
FROM CTE S INNER JOIN CTE1 A
ON S.TXNTYPE=A.TXNTYPE AND MONTH(S.[DATE])=A.MONTHDT AND S.RN-A.RN=1
)
,CTE2 AS
(
SELECT *
,ROW_NUMBER() OVER (PARTITION BY month(date),TxnType ORDER BY QTY DESC )RN1
FROM CTE1 S
)
SELECT A.DATE,A.QTY-(SELECT B.Qty from CTE2 B
where a.MONTHDT=b.MONTHDT and b.RN1=1 AND b.TxnType='OUT')
from CTE2 A
WHERE A.RN1=1 AND a.TxnType='IN'

Answer 2

Try this.
;WITH cte
AS (SELECT Row_number()OVER(partition BY item, Datepart(mm, date) ORDER BY date DESC) rn,
item,
Month(date) AS [month],
TxnType,
Price,
date
FROM #Stock
WHERE TxnType = 'IN'),
cte1
AS (SELECT Row_number() OVER(partition BY item, Datepart(mm, date) ORDER BY date DESC) rn,
item,
Month(date) [month],
(SELECT Sum(CASE
WHEN TxnType = 'out' THEN -1 * qty
ELSE qty
END) AS qty
FROM #Stock b
WHERE a.item = b.item
AND a.Date >= b.Date) qty
FROM #Stock a)
SELECT a.[month],
a.Item,
( a.Price * b.qty ) running_tot
FROM cte a
JOIN cte1 b
ON a.Item = b.Item
AND a.[month] = b.[month]
WHERE a.rn = 1
AND b.rn = 1