How to get list of values in GROUP_BY clause?

If I have data like this in a table

id   data
--   ----
1    1
1    2
1    3
2    4
2    5
3    6
3    4

How do I get results like this in a query (on sybase server)?

id   data
--   ----
1    1, 2, 3
2    4, 5
3    6, 4

I know that in MySQL there is GROUP_CONCAT and in Sybase I think it's LIST as stated in another answer:

SELECT id, LIST(data||', ')
FROM yourtable
GROUP BY id

In mysql, use

SELECT id, GROUP_CONCAT(data)
 FROM yourtable
 GROUP BY id

or use your custom separator:

SELECT id, GROUP_CONCAT(data SEPARATOR ', ')
 FROM yourtable
 GROUP BY id

see GROUP_CONCAT.

For PostgreSQL, using a similar function string_agg.

SELECT id, string_agg(data, ',')
FROM yourtable
GROUP BY id