SQL Server Arithmetic overflow error converting expression to data type int

Question

I'm getting this error:

msg 8115, level 16, state 2, line 18
Arithmetic overflow error converting expression to data type int.

With this SQL query:

DECLARE @year VARCHAR(4);                       
DECLARE @month VARCHAR(2);                      

-- START OF CONFIGURATION SECTION                       
-- THIS IS THE ONLY SECTION THAT SHOULD BE MODIFIED                     
-- SET THE YEAR AND MONTH PARAMETERS                        

SET @year = '2013';                     
SET @month = '3';  -- 1 = January.... 12 = Decemeber.                       

-- END OF CONFIGURATION SECTION                     

DECLARE @startDate DATE                     
DECLARE @endDate DATE                       
SET @startDate = @year + '-' + @month + '-01 00:00:00';                     
SET @endDate = DATEADD(MONTH, 1, @startDate);                       

SELECT                          
    DATEPART(YEAR, dateTimeStamp) AS [Year]                         
    , DATEPART(MONTH, dateTimeStamp) AS [Month]                         
    , COUNT(*) AS NumStreams                        
    , [platform] AS [Platform]                      
    , deliverableName AS [Deliverable Name]                     
    , SUM(billableDuration) AS NumSecondsDelivered                      
FROM                            
    DeliveryTransactions                        
WHERE                           
    dateTimeStamp >= @startDate                     
AND dateTimeStamp < @endDate                        
GROUP BY                            
    DATEPART(YEAR, dateTimeStamp)                       
    , DATEPART(MONTH, dateTimeStamp)                        
    , [platform]                        
    , deliverableName                       
ORDER BY                            
    [platform]                      
    , DATEPART(YEAR, dateTimeStamp)                         
    , DATEPART(MONTH, dateTimeStamp)                        
    , deliverableName  

Can someone please help me solve this?

Answer 1

Is the problem with SUM(billableDuration)? To find out, try commenting out that line and see if it works.

It could be that the sum is exceeding the maximum int. If so, try replacing it with SUM(CAST(billableDuration AS BIGINT)).

I hope this helps you.