How to Group Few Rows into One Rows In Query

Question

Dear All,
I've use the "Group By" syntax in my query, but when the result display, it still show few rows instead of one row.
Current Results
item         Jan       Feb        Mar
A              10          0           20
A              10          0            0
A               0           5            0
B               0           0           10
Desire Result
item        Jan         Feb         Mar
A             20           5           20
B             0             0           10
My query is:
/*select from [dbo].[oinv] T0 */
declare @customer varchar (200)
/* where */
set @customer = /* T0.Cardname */ '[%A]'
/*select from [dbo].[inv1] T1 */
declare @fromdate as datetime
/* where */
set @fromdate = /* T1.DOCDATE */ '[%1]'
/*select from [dbo].[inv1] T2 */
declare @tilldate as datetime
/* where */
set @tilldate = /* T1.DOCDATE */ '[%2]'
SELECT inv1.ITEMCODE, oitm.itemname,
CASE WHEN MONTH(INV1.DOCDATE) = 1 THEN SUM(QUANTITY) ELSE NULL END AS 'JAN',
CASE WHEN MONTH(INV1.DOCDATE) = 2 THEN SUM(QUANTITY) ELSE NULL END AS 'FEB',
CASE WHEN MONTH(INV1.DOCDATE) = 3 THEN SUM(QUANTITY) ELSE NULL END AS 'MAR',
CASE WHEN MONTH(INV1.DOCDATE) = 4 THEN SUM(QUANTITY) ELSE NULL END AS 'APR',
CASE WHEN MONTH(INV1.DOCDATE) = 5 THEN SUM(QUANTITY) ELSE NULL END AS 'MAY',
CASE WHEN MONTH(INV1.DOCDATE) = 6 THEN SUM(QUANTITY) ELSE NULL END AS 'JUN',
CASE WHEN MONTH(INV1.DOCDATE) = 7 THEN SUM(QUANTITY) ELSE NULL END AS 'JUL',
CASE WHEN MONTH(INV1.DOCDATE) = 8 THEN SUM(QUANTITY) ELSE NULL END AS 'AUG',
CASE WHEN MONTH(INV1.DOCDATE) = 9 THEN SUM(QUANTITY) ELSE NULL END AS 'SEPT',
CASE WHEN MONTH(INV1.DOCDATE) = 10 THEN SUM(QUANTITY) ELSE NULL END AS 'OCT',
CASE WHEN MONTH(INV1.DOCDATE) = 11 THEN SUM(QUANTITY) ELSE NULL END AS 'NOV',
CASE WHEN MONTH(INV1.DOCDATE) = 12 THEN SUM(QUANTITY) ELSE NULL END AS 'DEC'
FROM OINV inner join inv1 on oinv.DocEntry = inv1.DocEntry INNER JOIN OITM on inv1.itemcode = oitm.itemcode
WHERE oinv.cardname =@customer AND inv1.DOCDATE >=@fromdate AND inv1.DOCDATE <=@tilldate
GROUP BY inv1.ITEMCODE, oitm.itemname, inv1.docdate
I've tried to write in "Select Syntax" too, but still get the same result. I'm really have no idea what's wrong with my query. Thanks for all your help!
Cheers,
Serene

Answer 1

Hi Serene,
in last query I forgot in subquery condition for customer (the sum was for all customers).
Try this:
SELECT distinct inv1.ITEMCODE, oitm.itemname,
(select coalesce(sum(x.quantity),0) from inv1 x with(nolock), oinv xx with(nolock) where  xx.docentry = x.docentry and xx.cardname = @customer and inv1.itemcode = x.itemcode and month(x.docdate ) = 1 and x.DOCDATE >=@fromdate AND x.DOCDATE <=@tilldate) as 'JAN',
(select coalesce(sum(x.quantity),0) from inv1 x with(nolock), oinv xx with(nolock)  where  xx.docentry = x.docentry and xx.cardname = @customer and inv1.itemcode = x.itemcode and month(x.docdate ) = 2 and x.DOCDATE >=@fromdate AND x.DOCDATE <=@tilldate) as 'FEB',
(select coalesce(sum(x.quantity),0) from inv1 x with(nolock), oinv xx with(nolock)  where  xx.docentry = x.docentry and xx.cardname = @customer and inv1.itemcode = x.itemcode and month(x.docdate ) = 3 and x.DOCDATE >=@fromdate AND x.DOCDATE <=@tilldate) as 'MAR',
(select coalesce(sum(x.quantity),0) from inv1 x with(nolock), oinv xx with(nolock)  where xx.docentry = x.docentry and xx.cardname = @customer and  inv1.itemcode = x.itemcode and month(x.docdate ) = 4 and x.DOCDATE >=@fromdate AND x.DOCDATE <=@tilldate) as 'APR',
(select coalesce(sum(x.quantity),0) from inv1 x with(nolock), oinv xx with(nolock)  where xx.docentry = x.docentry and xx.cardname = @customer and  inv1.itemcode = x.itemcode and month(x.docdate ) = 5 and x.DOCDATE >=@fromdate AND x.DOCDATE <=@tilldate) as 'MAY',
(select coalesce(sum(x.quantity),0) from inv1 x with(nolock), oinv xx with(nolock)  where xx.docentry = x.docentry and xx.cardname = @customer and  inv1.itemcode = x.itemcode and month(x.docdate ) = 6 and x.DOCDATE >=@fromdate AND x.DOCDATE <=@tilldate) as 'JUN',
(select coalesce(sum(x.quantity),0) from inv1 x with(nolock), oinv xx with(nolock)  where xx.docentry = x.docentry and xx.cardname = @customer and  inv1.itemcode = x.itemcode and month(x.docdate ) = 7 and x.DOCDATE >=@fromdate AND x.DOCDATE <=@tilldate) as 'JUL',
(select coalesce(sum(x.quantity),0) from inv1 x with(nolock), oinv xx with(nolock)  where xx.docentry = x.docentry and xx.cardname = @customer and  inv1.itemcode = x.itemcode and month(x.docdate ) = 8 and x.DOCDATE >=@fromdate AND x.DOCDATE <=@tilldate) as 'AUG',
(select coalesce(sum(x.quantity),0) from inv1 x with(nolock), oinv xx with(nolock)  where xx.docentry = x.docentry and xx.cardname = @customer and  inv1.itemcode = x.itemcode and month(x.docdate ) = 9 and x.DOCDATE >=@fromdate AND x.DOCDATE <=@tilldate) as 'SEP',
(select coalesce(sum(x.quantity),0) from inv1 x with(nolock), oinv xx with(nolock)  where xx.docentry = x.docentry and xx.cardname = @customer and  inv1.itemcode = x.itemcode and month(x.docdate ) = 10 and x.DOCDATE >=@fromdate AND x.DOCDATE <=@tilldate) as 'OCT',
(select coalesce(sum(x.quantity),0) from inv1 x with(nolock), oinv xx with(nolock)  where xx.docentry = x.docentry and xx.cardname = @customer and  inv1.itemcode = x.itemcode and month(x.docdate ) = 11 and x.DOCDATE >=@fromdate AND x.DOCDATE <=@tilldate) as 'NOV',
(select coalesce(sum(x.quantity),0) from inv1 x with(nolock), oinv xx with(nolock)  where xx.docentry = x.docentry and xx.cardname = @customer and inv1.itemcode = x.itemcode and month(x.docdate ) = 12 and x.DOCDATE >=@fromdate AND x.DOCDATE <=@tilldate) as 'DEC'
FROM OINV
inner join inv1 on oinv.DocEntry = inv1.DocEntry
INNER JOIN OITM on inv1.itemcode = oitm.itemcode
WHERE oinv.cardname =@customer and quantity > 0
AND inv1.DOCDATE >=@fromdate AND inv1.DOCDATE <=@tilldate