Order

Below query combines the SUMS of two tables into a total SUM for a specific column.

WITH combiTable ([Table], xName, xValue)
AS ( SELECT 1 AS [Table], name, SUM(value) FROM Table1 GROUP BY name
     UNION
     SELECT 2 AS [Table], name, SUM(value) FROM Table2 GROUP BY name )
SELECT xName AS Name, SUM(xValue) AS Total FROM combiTable
GROUP BY xName
ORDER BY Total DESC
GO