getting sum using sql with multiple conditions

Question

I m having data in columns as: -

  Process   Volume      TAT
  1            1        Pass
  1            2        Fail
  2            5        Fail
  2                  


        

Answer 1

For SQL Server, you can use CASE expressions to conditionally determine the amount you need to add, then SUM them together, like this:

SELECT Process, SUM(Volume) AS TotalVolume, 
    SUM(CASE WHEN TAT = 'Pass' THEN Volume ELSE 0 END) AS Pass,
    SUM(CASE WHEN TAT = 'Fail' THEN Volume ELSE 0 END) AS Fail
FROM (
     -- Dummy data here for testing
    SELECT 1 AS Process, 1 as Volume, 'Pass' AS TAT
    UNION SELECT 1, 2, 'Fail'
    UNION SELECT 2, 5, 'Fail'
    UNION SELECT 2, 5, 'Pass'
    UNION SELECT 3, 1, 'Pass'
    UNION SELECT 4, 6, 'Fail'
    UNION SELECT 4, 4, 'Pass'
) MyTable
GROUP BY Process
ORDER BY Process

For Microsoft Access, CASE isn't supported, so you can use SWITCH or IIF, like so:

SUM(IIF(TAT = 'Pass', Volume, 0)) AS Pass