Linq to SQL: how to aggregate without a group by?

Question

I am searching for the Linq-to-SQL equivalent to this query:

SELECT   [cnt]=COUNT(*),   [colB]=SUM(colB),   [colC]=SUM(colC),   [colD]=SUM(colD) FROM myTable 

This is an aggregate without a group by. I can't seem to find any way to do this, short of issuing four separate queries (one Count and three Sum). Any ideas?

Answer 1

This is what I found seems like you still have to do a group by...can just use constant:

var orderTotals =     from ord in dc.Orders     group ord by 1 into og     select new     {         prop1 = og.Sum(item=> item.Col1),         prop2 = og.Sum(item => item.Col2),         prop3 = og.Count(item => item.Col3)     }; 

This produces the following SQL, which is not optimal, but works:

SELECT SUM([Col1]) as [prop1], SUM([Col2]) as [prop2], COUNT(*) AS [prop3] FROM (     SELECT 1 AS [value], [t0].[Col1], [t0].[Col2], [t0].[Col3]     FROM [table] AS [t0]     ) AS [t1] GROUP BY [t1].[value]