query help

[Praba Karan]

SELECT group_concat( s1.user_name, s2.user_name, s3.user_name
SEPARATOR '-' ) , group_concat( s1.user_id, s2.user_id, s3.user_id
SEPARATOR ',' )
FROM `partners_staffs` s1
LEFT JOIN `partners_staffs` s2 ON s1.primary_user = s2.user_id
LEFT JOIN `partners_staffs` s3 ON s2.primary_user = s3.user_id


How do I get this in undefined loops let me say if 4 loops I will have
name1-name2,name3,name4
if 3 loops
name1-name2,name3
if 2 loops
name1-name2

Is there any method I can use?

Thank you for reading.