SQL & PL/SQL :: Convert Many Rows To One

I use Oracle 11g and a Middleware which sends the SQL Statements to the database. That's why I can't send you loggings.

However, I' got this SQL:

With CTE
AS
(
select * from
data A2
WHERE
A2.ID ='536031'
AND
A2.AttrID = '6'
)

That code gives me the following result:

ID.........Version....AttrID.......group
536031......3.........6..............test5
536031......3.........6..............test6

What I try to do. I want to get all groups. The Groups should be in one column...the the result must be the following:

ID.........group
536031...test5, test6

In SQL server I always used

SELECT ID,
STUFF((SELECT ',' + [group] FROM CTE WHERE ID = c.ID ORDER BY [Version] FOR XML PATH('')),1,1,'')
FROM (SELECT DISTINCT ID FROM CTE)c

to achieve that. Is there a similar function in oracle like XML PATH? Or another way the get the result?