Question

I have a stored procedure that returns data in the format of:

Date  |  Unit A Count  |  Unit B Count  |  Unit C Count
2010  |         335    |          52    |         540
2011  |         384    |          70    |         556
2012  |         145    |          54    |         345

Internally this stored procedure makes a call to another stored procedure, so I can’t nest it again.
What I’m after is a way to pivot the above output so it looks like this:

              |  2010  |  2011  |  2012
Unit A Count  |   335  |   384  |   145
Unit B Count  |    52  |    70  |    54
Unit C Count  |   540  |   556  |   345

Edit: The StorProc is called with 3 parameters and I do need to keep the original output.

Any ideas?

I’m using SQL Server 2005, Visual Studio 2008, C# with the output going to an .aspx page.

Answer 1

If you want to transform the results of your stored procedure, then you will need to use UNPIVOT and PIVOT to get your final product:

See a SQL Fiddle with a Demo

select *
from 
(
    select date, value, unit
    from 
    (
        select *
        from t1
    ) x
    unpivot ([value] for unit in ([unita], [unitb], [unitc])) u
) a
pivot
(
    sum(value)
    for date in ([2010], [2011], [2012])
) p

You want to transform these values in your store procedure, then you would have to post that full query so we could see it.