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SQL Pivot Dynamically

I have a table that has a large number of columns, one of them being StartYear.  I would love a query that takes all the unique values in the StartYear column and puts them into columns of their own, and pivots with a column:  Actual
So current table is:  
AgreementID   StartYear   Actual
1                          2004          $56
1                          2004          $23
1                          2005          $85
2                          2008          $77

and it would turn into:
AgreementID       2004   2005   2008
1                             56
1                             23
1                                       85
2                                                  77

And I would need this query to add new columns automatically everytime new start years are added to the data in the original table.  Is this possible?



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Plamodo
Asked:
Plamodo
3 Solutions
 
Guy Hengel [angelIII / a3]Billing EngineerCommented:
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ralmadaCommented:
Aside from using a dynamic pivot as indicated by AngelIII, you will need to add a column to make this pivot display the data the way you want, in your case I'm using the row_number() function. Please check the following query.
Declare @strSQL varchar(max) 
DECLARE @cols varchar(2000) 
  
  
  
SELECT  @cols = STUFF(( SELECT DISTINCT  
                                '],[' + cast(StartYear as varchar) 
                        FROM    yourtable 
                        ORDER BY 1 
                        FOR XML PATH('') 
                      ), 1, 2, '') + ']' 
  
  
set @strSQL = 'select AgreementID, ' + @cols + 
                ' from ( 
                        SELECT AgreementID, StartYear, Actual, row_number() over (order by agreementID) rn 
                        FROM yourtable 
                ) o 
                pivot (max(Actual) FOR StartYear in (' + @cols + ')) p' 
  
exec(@strSQL)

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PlamodoAuthor Commented:
ralmada:

Okay, I created the stored proc (FundingActuals), and got it to execute as per what I had in mind - which is fantastic.  Now, how do I encorporate that into a view?  Can I somehow do a "SELECT * FROM FundingActuals" ?  I want to be able to query those results.

Stored procs are a pretty new/foreign to me.

I just need to know how I can use this proc, and I'll divy out the points.
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ralmadaCommented:
You can use Openrowset to "query" the result of the stored procedure. Attached you will see both ways, using SQL authentication and Windows authentication
--SQL Authentication
SELECT * 
FROM OPENROWSET('SQLOLEDB','SERVER=YourServerName;Database=yourdatabase;UID=username;PWD=PASSWORD',  'Exec FundingActuals') AS a;

--Windows authentication
SELECT * 
FROM OPENROWSET('SQLOLEDB','SERVER=YourServerName;Trusted_Connection=Yes;Database=yourdatabase',  'Exec FundingActuals') AS a;

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PlamodoAuthor Commented:
Hmm.  That didn't work.  I get an error "because this component is turned off as part of the security configuration.

There must be a way to use a stored proc in views - no?  How are they usually used?
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ralmadaCommented:
>>because this component is turned off as part of the security configuration.<<
You need to enable ad hoc distributed queries. try running this code before
sp_configure 'Ad Hoc Distributed Queries', 1
RECONFIGURE
GO


>>There must be a way to use a stored proc in views - no?  How are they usually used?
Usually you will create a function rather than a stored procedure, but the problem is that you have dynamic SQL in there which you cannot use it in a function.
Therefore the only way I see is using the distributed query (OPENROWSET) as I indicated above.
 
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PlamodoAuthor Commented:
That didn't work.  Said the ad hock distributed queries does not exist.  And that I don't have permission to run the reconfigure statement.

I'm going to talk to the DBA about this issue and see where it goes from there...
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ralmadaCommented:
Alternatively, you can ask the DBA to create the linked server for you with sp_addlinkedserver
http://technet.microsoft.com/en-us/library/ms190479.aspx 
and then run the query lilke this:
select * from OPENQUERY('yourlinkedservername', 'Exec FundingActuals') --change the server name with the name assigned by the DBA.
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PlamodoAuthor Commented:
Darn.  DBA is away until after the holidays.
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PlamodoAuthor Commented:
I just realized I'm making this too complex.  I am building sql rowsource for a listbox, so I'll know which columns I need at the moment, and can specify the years with code depending on what the user has selected.

eg.  SELECT     AgreementSeriesID, [2005] AS F2005, [2006] AS F2006
FROM         (SELECT     AgreementSeriesID, FiscalStartYear, ActualAmount
                       FROM          FundingYearly) fy PIVOT (SUM(ActualAmount) FOR FiscalStartYear IN ([2005], [2006])) AS pvt

So, all I need to know now is how do I insert a where clause into this?
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SharathData EngineerCommented:
like this.

 SELECT     AgreementSeriesID, [2005] AS F2005, [2006] AS F2006
FROM         (SELECT     AgreementSeriesID, FiscalStartYear, ActualAmount
                       FROM          FundingYearly
                   WHERE FiscalStartYear IN ('2005','2006')) fy PIVOT (SUM(ActualAmount) FOR FiscalStartYear IN ([2005], [2006])) AS pvt
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PlamodoAuthor Commented:
Thanks guys.
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