Pivot data in T-SQL

Question

I have a group of people. Lets call them A,B,C. I have a table that shows how much they were paid each month....

PERSON|MONTH|PAID
A      JAN   10
A      FEB         


        

Answer 1

I am not sure why you need a dynamic # of columns, since there are always 12 months in a year. Also your month names seem a bit inconsistent in length.

Sample result set:

SELECT * FROM (SELECT 'A' [PERSON],'JAN' [MONTH],'10' [PAID]
UNION SELECT 'A','FEB',20
UNION SELECT 'B','JAN',10
UNION SELECT 'B','FEB',20
UNION SELECT 'B','SEP',30
UNION SELECT 'C','JAN',10
UNION SELECT 'C','JUNE',20
UNION SELECT 'C','JULY',30
UNION SELECT 'C','SEP',40) AS A
PIVOT (SUM([PAID]) FOR [MONTH] IN ([JAN],[FEB],[MARCH],[APRIL],[MAY],[JUNE],[JULY],[AUG],[SEP],[OCT],[NOV],[DEC])) p

Against your table this would become:

SELECT [PERSON],[MONTH],[PAID]
FROM [YOURTABLE]
PIVOT (SUM([PAID]) FOR [MONTH] IN ([JAN],[FEB],[MARCH],[APRIL],[MAY],[JUNE],[JULY],[AUG],[SEP],[OCT],[NOV],[DEC])) p

If you add a year column it looks like this:

SELECT * FROM (SELECT 'A' [PERSON],'JAN' [MONTH],'10' [PAID], 2011 [YEAR]
UNION SELECT 'A','FEB',20, 2011
UNION SELECT 'B','JAN',10, 2011
UNION SELECT 'A','FEB',20, 2010
UNION SELECT 'B','JAN',10, 2010
UNION SELECT 'B','FEB',20,2011
UNION SELECT 'B','SEP',30,2011
UNION SELECT 'C','JAN',10,2011
UNION SELECT 'C','JUNE',20,2011
UNION SELECT 'C','JULY',30,2011
UNION SELECT 'C','SEP',40,2011) AS A
PIVOT (SUM([PAID]) FOR [MONTH] IN ([JAN],[FEB],[MARCH],[APRIL],[MAY],[JUNE],[JULY],[AUG],[SEP],[OCT],[NOV],[DEC])) p