Krijg alle verkochte items op basis van een verzameling items uit een hoofdtabel in SQL Server

Hiermee kom je waarschijnlijk het meest op de goede weg. Ik heb geen logica toegevoegd om de samenvattingskolommen te verplaatsen, omdat dat maar voor twee categorieën zou werken, en ik neem aan dat je er nog veel meer hebt.

CREATE TABLE #Master(ItemNo int,[Name] varchar(50), Category varchar(5)) 
INSERT INTO #Master VALUES(10001,'Apple','C1' )   
INSERT INTO #Master VALUES(10002, 'Coffee' ,'C1')  
INSERT INTO #Master VALUES(10003,'Bread','C2')   
INSERT INTO #Master VALUES(10004,'Beans' ,'C2')  

CREATe TABLE #Transactions(SiteID int,BusinessDate date,ItemName varchar(50),[Units Sold]int,[Units Sale]int,ItemNo int,  OrderNo varchar(20))
INSERT INTO #Transactions VALUES(1,'06/08/2018','Apple',1,5,10001,'122-1')
INSERT INTO #Transactions VALUES(1,'06/08/2018','Coffee',1,16,10002,'122-1')
INSERT INTO #Transactions VALUES(1,'06/08/2018','Bread',2,7,10003,'122-1')
INSERT INTO #Transactions VALUES(1,'06/08/2018','Beans',9,18,10004,'122-1')
INSERT INTO #Transactions VALUES(1,'06/08/2018','Apple',2,5,10001,'122-4')
INSERT INTO #Transactions VALUES(1,'06/08/2018','Coffee',2,6,10002,'122-4')
INSERT INTO #Transactions VALUES(1,'06/08/2018','Bread',1,7,10003,'122-4')
INSERT INTO #Transactions VALUES(1,'06/08/2018','Beans',4,8,10004,'122-4')
INSERT INTO #Transactions VALUES(2,'06/08/2018','Apple',2,5,10001,'122-2')
INSERT INTO #Transactions VALUES(2,'06/08/2018','Coffee',1,6,10002,'122-2')
INSERT INTO #Transactions VALUES(3,'06/08/2018','Bread',3,5,10003,'122-3')
INSERT INTO #Transactions VALUES(3,'06/08/2018','Beans',7,17,10004,'122-3')


;WITH CTE AS (
select MS.ItemNo,MS.Name,MS.Category, SUM(TR.[Units Sold]) RootItemSold, tr.OrderNo
from #Master MS
INNER JOIN #Transactions TR on MS.ItemNo = TR.ItemNo
GROUP BY MS.ItemNo,MS.Name,MS.Category, tr.OrderNo
),
MiddleCalc as
(
select ItemNo, [Name],Category,RootItemSold,OrderNo
,(SELECT ISNULL(SUM(1),0)  FROM CTE T2 where TRoot.OrderNo = t2.OrderNo and TRoot.Category <> t2.Category) HasOtherCategory
from CTE TRoot
)
SELECT ItemNo,[Name],[Category], 
CASE WHEN Category = 'C1' THEN
        SUM(RootItemSold)  
    ELSE
        SUM(CASE WHEN HasOtherCategory <> 0 THEN RootItemSold ELSE 0 END)  END C1,
CASE WHEN Category = 'C2' THEN
        SUM(RootItemSold)  
    ELSE
        SUM(CASE WHEN HasOtherCategory <> 0 THEN RootItemSold ELSE 0 END)  END C2
FROM MiddleCalc
GROUP BY ItemNo,[Name],[Category]