T-SQL Pivot with multiple aggregates on the same column

Question

This seems like it should be a common need, but I'm not seeing how to do this using T-SQL PIVOT function. Specifically, I want to calculate the AVG and STDEV for a column over a Pivot column value. The data look something like this (lots of data omitted, but this gets to the heart):

--------------------------------------------------------------------------
ID           Year     PersonID     Score 
--------------------------------------------------------------------------
106          2001        1          20
107          2002        1          30       
108          2003        1          40       
109          2004        1          50     
106          2002        2          20
107          2003        2          50       
108          2004        2          30       
109          2005        2          10   
--------------------------------------------------------------------------

I would like to see the following output

--------------------------------------------------------------------------
NonPivotCol1 NonPivotCol2  2001_Mean   2001_Avg  2002_Mean  2002_Avg  Etc 
--------------------------------------------------------------------------
Some Value   Some Value       32          5.2       28          3.1 
Etc. 
--------------------------------------------------------------------------

Do I need to revert to the old CASE statement logic?

Thanks!

Answer 1

Yes.

Just use the old style CASE syntax.

SELECT AVG(CASE WHEN Year = 2001 THEN Score END) AS 2001_Avg,
       STDEV(CASE WHEN Year = 2001 THEN Score END) AS 2001_StDev /*...*/

PIVOT is just (less versatile) syntactic sugar for this anyway.

Oracle supports multiple aggregates in PIVOT but TSQL doesn't.

Answer 2

use case statements. You have to specify all columns anyway and I'd say that case is more usable than pivot

select
  avg(case when [Year] = 2001 then [Score] else null end) as [2001_Avg],
  avg(case when [Year] = 2002 then [Score] else null end) as [2002_Avg]
from Table1