Question

I am attempting to develop an SQL field that is the sum of all columns for the row excluding the first two. Below is my code, which returns columns MonthYear, Total, Sum1, Sum2, and Sum3. I’d like to have a FinalSum which totals Sum1,Sum2, and Sum3. This is to be used to counter check the Total column for accuracy. Is there a way to do this? Running Microsoft SQL Server 2005 – T-SQL

SELECT MonthYear,
            COUNT(*) AS Total,
            ISNULL(
                SUM(
                    CASE 
                    WHEN Status='Sum1'                  THEN 1
                    ELSE 0
                    END
                )
            ,0) AS [Sum1],
ISNULL(
                SUM(
                    CASE 
                    WHEN Status='Sum2'                  THEN 1
                    ELSE 0
                    END
                )
            ,0) AS [Sum2],
ISNULL(
                SUM(
                    CASE 
                    WHEN Status='Sum3'                  THEN 1
                    ELSE 0
                    END
                )
            ,0) AS [Sum3]
FROM tablename

GROUP BY
    MonthYear

Answer 1

You are missing a FROM on your query. Anyway, one way would be using a derived table:

SELECT *, [Sum1]+[Sum2]+[Sum3] AS TotalSum
FROM (Your Current Select Here) AS T

For SQL Server 2005+, you can also use CTEs:

;WITH CTE AS 
(
    Your Current Select Here
)
SELECT *, [Sum1]+[Sum2]+[Sum3] AS TotalSum
FROM CTE