How can I combine multiple rows into a comma-delimited list in SQL Server 2005?

Question

Right now, I have a SQL Query like this one:

SELECT X, Y FROM POINTS

It returns results like so:

X    Y
----------
12   3
15   2
18   12
20   29

I'd like to return results all in one row, like this (suitable for using in an HTML <AREA> tag):

XYLIST
----------
12,3,15,2,18,12,20,29

Is there a way to do this using just SQL?

Answer 1

Thanks for the quick and helpful answers guys!

I just found another fast way to do this too:

SELECT  STUFF(( SELECT ',' + X + ',' + Y
                FROM Points
              FOR
                XML PATH('')
              ), 1, 1, '') AS XYList

Credit goes to this guy:

http://geekswithblogs.net/mnf/archive/2007/10/02/t-sql-user-defined-function-to-concatenate-column-to-csv-string.aspx