How to Sum & Group By the results of a Union select query - sql-server-2008

Question

I have a query which Union's two separate queries with the same fields / data types. The query is as follows:
SELECT BusinessUnitName, BuildingNumber, Description, Value_1,
LifeRemaining, Sum_Quant
FROM
(
SELECT bu.BusinessUnitName, b.BuildingNumber, ec.Description, SUM(cc.MonetaryValue) AS Value_1,
cc.LifeRemaining, SUM(a.Quantity) AS Sum_Quant
FROM tbBuildingLinkBusinessUnit as blb INNER JOIN
tbBusinessUnit as bu ON blb.BusinessUnitID = bu.BusinessUnitID INNER JOIN
tbBuilding as b ON blb.BuildingID = b.BuildingID INNER JOIN
tbFloor ON b.BuildingID = tbFloor.BuildingID INNER JOIN
tbRoom as r ON tbFloor.FloorID = r.FloorID INNER JOIN
tbConditionComponent as cc INNER JOIN
tbAsset as a ON cc.ParentID = a.AssetUID INNER JOIN
tbElement as e ON cc.ElementID = e.ElementID AND a.ElementID = e.ElementID INNER JOIN
tbElementCategory as ec ON e.ElementCategoryID = ec.ElementCategoryID ON r.RoomID = a.LocationID
WHERE (cc.MonetaryValue > 0)
GROUP BY bu.BusinessUnitName, b.BuildingNumber, ec.Description, a.Status, cc.LifeRemaining
HAVING (a.Status = 0)
UNION
SELECT bu.BusinessUnitName, b.BuildingNumber, ec.Description, SUM(cc.MonetaryValue) AS Value_1,
cc.LifeRemaining, SUM(a.Quantity) AS Sum_Quant
FROM tbBuildingLinkBusinessUnit as blb INNER JOIN
tbBusinessUnit as bu ON blb.BusinessUnitID = bu.BusinessUnitID INNER JOIN
tbBuilding as b ON blb.BuildingID = b.BuildingID INNER JOIN
tbConditionComponent as cc INNER JOIN
tbAsset as a ON cc.ParentID = a.AssetUID INNER JOIN
tbElement as e ON cc.ElementID = e.ElementID AND a.ElementID = e.ElementID INNER JOIN
tbElementCategory as ec ON e.ElementCategoryID = ec.ElementCategoryID ON b.BuildingID = a.LocationID
WHERE (cc.MonetaryValue > 0)
GROUP BY bu.BusinessUnitName, b.BuildingNumber, ec.Description, a.Status, cc.LifeRemaining
HAVING (a.Status = 0)
) AS x
ORDER BY BusinessUnitName, Description
The results of the individual select queries are as follows with the first two lines coming from query 1 and the second two lines coming from query 2:
TEST PROPERTY | 1/A | Electrical services | 515.82 | 0 | 3
TEST PROPERTY | 1/A | Electrical services | 125 | 1 | 2
TEST PROPERTY | 1/A | Electrical services | 381.6 | 0 | 8
TEST PROPERTY | 1/A | Electrical services | 80615.93 | 5 | 7
My question is how can I now amalgamate the results of the the two queries so that the first result from both queries perform a SUM as they both have the value 0 in column 5? This will result in 3 rows of result with rows 1 and 3 combined.
Thanks in advance

Answer 1

Use
Derived GROUP BY your_value
Try like below,
SELECT BusinessUnitName, BuildingNumber, Description,
LifeRemaining, SUM(Value_1) as Value, SUM(Sum_Quant) as Quant
FROM
(
SELECT bu.BusinessUnitName, b.BuildingNumber, ec.Description, SUM(cc.MonetaryValue) AS Value_1,
cc.LifeRemaining, SUM(a.Quantity) AS Sum_Quant
FROM tbBuildingLinkBusinessUnit as blb INNER JOIN
tbBusinessUnit as bu ON blb.BusinessUnitID = bu.BusinessUnitID INNER JOIN
tbBuilding as b ON blb.BuildingID = b.BuildingID INNER JOIN
tbFloor ON b.BuildingID = tbFloor.BuildingID INNER JOIN
tbRoom as r ON tbFloor.FloorID = r.FloorID INNER JOIN
tbConditionComponent as cc INNER JOIN
tbAsset as a ON cc.ParentID = a.AssetUID INNER JOIN
tbElement as e ON cc.ElementID = e.ElementID AND a.ElementID = e.ElementID INNER JOIN
tbElementCategory as ec ON e.ElementCategoryID = ec.ElementCategoryID ON r.RoomID = a.LocationID
WHERE (cc.MonetaryValue > 0)
GROUP BY bu.BusinessUnitName, b.BuildingNumber, ec.Description, a.Status, cc.LifeRemaining
HAVING (a.Status = 0)
UNION
SELECT bu.BusinessUnitName, b.BuildingNumber, ec.Description, SUM(cc.MonetaryValue) AS Value_1,
cc.LifeRemaining, SUM(a.Quantity) AS Sum_Quant
FROM tbBuildingLinkBusinessUnit as blb INNER JOIN
tbBusinessUnit as bu ON blb.BusinessUnitID = bu.BusinessUnitID INNER JOIN
tbBuilding as b ON blb.BuildingID = b.BuildingID INNER JOIN
tbConditionComponent as cc INNER JOIN
tbAsset as a ON cc.ParentID = a.AssetUID INNER JOIN
tbElement as e ON cc.ElementID = e.ElementID AND a.ElementID = e.ElementID INNER JOIN
tbElementCategory as ec ON e.ElementCategoryID = ec.ElementCategoryID ON b.BuildingID = a.LocationID
WHERE (cc.MonetaryValue > 0)
GROUP BY bu.BusinessUnitName, b.BuildingNumber, ec.Description, a.Status, cc.LifeRemaining
HAVING (a.Status = 0)
) Derived GROUP BY BusinessUnitName, BuildingNumber, Description,
LifeRemaining
ORDER BY BusinessUnitName, Description
For reference
https://social.msdn.microsoft.com/forums/sqlserver/en-US/cd32bf58-c581-404b-a384-e62cdda7a131/union-all-and-group-by-query
hope it helps...