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?
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]