Question

(from pd in context.Report
where pd.ReportDate.Month == 2012
&& pd.ReportDate.Year == 11 && pd.UserID == 11014
group pd by  pd.UserID  into g
select new 
{                               
    Cost = g.Sum(pd => pd.Cost),
    RevenueUSD = g.Sum(pd => pd.Revenue),
});

This Query is

 -- Region Parameters
    DECLARE @p0 Int = 2012
    DECLARE @p1 Int = 11
    DECLARE @p2 Int = 11014
    -- EndRegion
    SELECT SUM([t0].[Cost]) AS [Cost], SUM([t0].[Revenue]) AS [RevenueUSD]
    FROM [IntegratedPublisherData] AS [t0]
    WHERE (DATEPART(Month, [t0].[ReportDate]) = @p0) AND (DATEPART(Year, [t0].[ReportDate]) = @p1) AND ([t0].[UserID] = @p2)
    GROUP BY [t0].[UserID]

But I Want

 -- Region Parameters
    DECLARE @p0 Int = 2012
    DECLARE @p1 Int = 11
    DECLARE @p2 Int = 11014
    -- EndRegion
    SELECT SUM([t0].[Cost]) AS [Cost], SUM([t0].[Revenue]) AS [RevenueUSD]
    FROM [IntegratedPublisherData] AS [t0]
    WHERE (DATEPART(Month, [t0].[ReportDate]) = @p0) AND (DATEPART(Year, [t0].[ReportDate]) = @p1) AND ([t0].[UserID] = @p2)

This query will return 1 row because UserID is selected to one value and it’s grouped by UserID.

How can I write this Linq query using Sum without grouping?

Answer 1

This will also cover your problem, if there are multiple rows returned from the query. Also works for a single row.

var query = 
    (from pd in context.Report
     where pd.ReportDate.Month == 11
     && pd.ReportDate.Year == 2012 
     && pd.UserID == 11014
     select pd).ToList() //use .ToList() to avoid doubled execution
var result = 
    new 
    {
        Cost = query.Sum(pd => pd.Cost), 
        RevenueUSD = query.Sum(pd => pd.Revenue) 
    };