Compare two results from the same table

Question

i have two results from the same table that i would like to compare. below is my query and the results i want to compare
SELECT tblItemRoutingBOM.ItemRevID, tblItem.ItemID, tblItem.PartNum, tblItem.ItemName, tblItem.ManufacturerPartNum AS [Mfg Part#], tblItemRoutingBOM.Quantity
FROM tblItemRouting
INNER JOIN tblItemRoutingBOM ON tblItemRouting.ItemRoutingID = tblItemRoutingBOM.ItemRoutingID
INNER JOIN tblItem ON tblItemRoutingBOM.ItemID = tblItem.ItemID
WHERE tblItemRoutingBOM.ItemRevID in (61,70)
as you can see i am returning two records using the where clause
ItemRevID, ItemID, PartNum, ItemName, Manufacturer, Mfg Part#, Quantity
61,121,331503,.233 Aluminum Sheet,,1
70,121,331503,.233 Aluminum Sheet,,3
now what i am looking for is to combine these two together into one row with the following added.  two columns for each QTY, QTY1 = 1 and QTY2 = 3 with a third column added that is the difference between the two QTY Diff = 2
Any thoughts?

Answer 1

Here are the two statements that i want to combine, results for each are attached
SELECT tblItem.ItemID, Sum(tblItemRoutingBOM.Quantity) AS SumOfQuantity, tblItem.PartNum AS [Part #],
tblItem.ItemName, tblManufacturer.ManufacturerName AS Manufacturer, tblItem.ManufacturerPartNum AS [Mfg Part#]
FROM tblItemRouting
INNER JOIN tblItemRoutingBOM ON tblItemRouting.ItemRoutingID = tblItemRoutingBOM.ItemRoutingID
INNER JOIN tblItem ON tblItemRoutingBOM.ItemID = tblItem.ItemID
INNER JOIN tblUnits ON tblItem.UnitID = tblUnits.UnitID
LEFT JOIN tblManufacturer ON tblItem.ManufacturerID = tblManufacturer.ManufacturerID
WHERE tblItemRoutingBOM.ItemRevID=61
GROUP BY tblItem.ItemID,tblItem.PartNum,tblItem.ItemName,tblManufacturer.ManufacturerName,tblItem.ManufacturerPartNum
SELECT tblItem.ItemID, Sum(tblItemRoutingBOM.Quantity) AS Quantity, tblItem.PartNum AS [Part #],
tblItem.ItemName, tblManufacturer.ManufacturerName AS Manufacturer, tblItem.ManufacturerPartNum AS [Mfg Part#]
FROM tblItemRouting
INNER JOIN tblItemRoutingBOM ON tblItemRouting.ItemRoutingID = tblItemRoutingBOM.ItemRoutingID
INNER JOIN tblItem ON tblItemRoutingBOM.ItemID = tblItem.ItemID
INNER JOIN tblUnits ON tblItem.UnitID = tblUnits.UnitID
LEFT JOIN tblManufacturer ON tblItem.ManufacturerID = tblManufacturer.ManufacturerID
WHERE tblItemRoutingBOM.ItemRevID=70
GROUP BY tblItem.ItemID,tblItem.PartNum,tblItem.ItemName,tblManufacturer.ManufacturerName,tblItem.ManufacturerPartNum
114,11,55002,Pepsi Blue Cap,NULL,
117,5,331501,Marigold Yellow For ABS,NULL,
121,1,331503,.233 Aluminum Sheet,NULL,
125,2,331504,Velvet Vinyl .008,NULL,
114,33,55002,Pepsi Blue Cap,NULL,
117,15,331501,Marigold Yellow For ABS,NULL,
121,3,331503,.233 Aluminum Sheet,NULL,
125,6,331504,Velvet Vinyl .008,NULL,
my returned result should combine above with two extra columns (two extra columns because i have two results to combine)
114, 11, 33, 22, 55002, Pepsi Blue Cap, NULL,
117, 5, 15, 10, 331501, Marigold Yellow For ABS, NULL
121,1, 3, 2, 331503, .233 Aluminum Sheet, NULL
125, 2, 6, 4, 331504, Velvet Vinyl .008, NULL
Columns go as such, ID, QTY1 (for 61), QTY2 (for 70), Diff (QTY1-QTY2), PartNum, ItemName, Mfg, Mfg Part#
IF the results from one of those two are empty then i would see something like this
114, 11, 0, 11, 55002, Pepsi Blue Cap, NULL,
117, 5, 0, 5, 331501, Marigold Yellow For ABS, NULL
121,1, 0, 1, 331503, .233 Aluminum Sheet, NULL
125, 2, 0, 2, 331504, Velvet Vinyl .008, NULL