Total the results of a subquery in group by - sql

Question

I have a query that produces the detailed data I need.
Now I need to change the results to produce a single total by dbo.Contract.Description and dbo.PMTask.Description instead of the individual entries that would comprise the total.
Here's what I have that works:
SELECT dbo.Contract.Description, dbo.PMTask.Description,
CAST(dbo.PMTimeActivity.TimeBillable AS decimal(10, 2)) / 60 *
(SELECT SalesPrice
FROM dbo.ARSalesPrice AS ARSalesPrice_1
WHERE (InventoryID = dbo.InventoryItem.InventoryID) AND (dbo.PMTimeActivity.Date >= EffectiveDate) AND (dbo.PMTimeActivity.Date <= ExpirationDate) AND (dbo.InventoryItem.CompanyID = CompanyID)) AS Amount
FROM dbo.InventoryItem
RIGHT OUTER JOIN dbo.PMTask
INNER JOIN dbo.Contract ON dbo.PMTask.CompanyID = dbo.Contract.CompanyID AND dbo.PMTask.ProjectID = dbo.Contract.ContractID
INNER JOIN dbo.PMTimeActivity ON dbo.PMTask.CompanyID = dbo.PMTimeActivity.CompanyID AND dbo.PMTask.ProjectID = dbo.PMTimeActivity.ProjectID AND dbo.PMTask.TaskID = dbo.PMTimeActivity.ProjectTaskID
ON dbo.InventoryItem.CompanyID = dbo.PMTimeActivity.CompanyID AND dbo.InventoryItem.InventoryID = dbo.PMTimeActivity.LabourItemID
WHERE (dbo.PMTimeActivity.IsCorrected = 0) AND (dbo.PMTimeActivity.IsBillable = 1) AND (dbo.PMTimeActivity.Billed = 0) AND (dbo.PMTimeActivity.DeletedDatabaseRecord <> 1)
How do I change the query such that when I add the following Group By I achieve what I want?
Group By dbo.Contract.Description, dbo.PMTask.Description
Any suggestions most welcome.

Answer 1

Once you correct your query such that it works (there is a missing join table) then just add an outer query which sums the amount and groups as specified e.g.
select ContractDescription, TaskDescription, sum(Amount)
from (
SELECT dbo.[Contract].[Description] ContractDescription, dbo.PMTask.[Description] TaskDescription
, CAST(dbo.PMTimeActivity.TimeBillable AS decimal(10, 2)) / 60 * (
SELECT SalesPrice
FROM dbo.ARSalesPrice AS ARSalesPrice_1
WHERE (InventoryID = dbo.InventoryItem.InventoryID) AND (dbo.PMTimeActivity.[Date] >= EffectiveDate) AND (dbo.PMTimeActivity.[Date] <= ExpirationDate) AND (dbo.InventoryItem.CompanyID = CompanyID
)) AS Amount
FROM dbo.InventoryItem
RIGHT OUTER JOIN dbo.PMTask
INNER JOIN dbo.[Contract] ON dbo.PMTask.CompanyID = dbo.[Contract].CompanyID AND dbo.PMTask.ProjectID = dbo.[Contract].ContractID
INNER JOIN dbo.PMTimeActivity ON dbo.PMTask.CompanyID = dbo.PMTimeActivity.CompanyID AND dbo.PMTask.ProjectID = dbo.PMTimeActivity.ProjectID AND dbo.PMTask.TaskID = dbo.PMTimeActivity.ProjectTaskID
/* What should go here */ ON dbo.InventoryItem.CompanyID = dbo.PMTimeActivity.CompanyID AND dbo.InventoryItem.InventoryID = dbo.PMTimeActivity.LabourItemID
WHERE (dbo.PMTimeActivity.IsCorrected = 0) AND (dbo.PMTimeActivity.IsBillable = 1) AND (dbo.PMTimeActivity.Billed = 0) AND (dbo.PMTimeActivity.DeletedDatabaseRecord <> 1)
) X
group by ContractDescription, TaskDescription;

Answer 2

Grouping sets with an empty set will give you a grand total for your groupings, you could use instead cube however that will also generate sub totals for each of your grouped columns as well.
SELECT dbo.Contract.Description, dbo.PMTask.Description,
CAST(dbo.PMTimeActivity.TimeBillable AS decimal(10, 2)) / 60 *
(SELECT SalesPrice
FROM dbo.ARSalesPrice AS ARSalesPrice_1
WHERE (InventoryID = dbo.InventoryItem.InventoryID) AND (dbo.PMTimeActivity.Date >= EffectiveDate) AND (dbo.PMTimeActivity.Date <= ExpirationDate) AND (dbo.InventoryItem.CompanyID = CompanyID)) AS Amount
FROM dbo.InventoryItem RIGHT OUTER JOIN
dbo.PMTask INNER JOIN
dbo.Contract ON dbo.PMTask.CompanyID = dbo.Contract.CompanyID AND dbo.PMTask.ProjectID = dbo.Contract.ContractID INNER JOIN
dbo.PMTimeActivity ON dbo.PMTask.CompanyID = dbo.PMTimeActivity.CompanyID AND dbo.PMTask.ProjectID = dbo.PMTimeActivity.ProjectID AND dbo.PMTask.TaskID = dbo.PMTimeActivity.ProjectTaskID ON
dbo.InventoryItem.CompanyID = dbo.PMTimeActivity.CompanyID AND dbo.InventoryItem.InventoryID = dbo.PMTimeActivity.LabourItemID
WHERE (dbo.PMTimeActivity.IsCorrected = 0) AND (dbo.PMTimeActivity.IsBillable = 1) AND (dbo.PMTimeActivity.Billed = 0) AND (dbo.PMTimeActivity.DeletedDatabaseRecord <> 1)
Group By Grouping Sets (dbo.Contract.Description, dbo.PMTask.Description, ())