SQL Server Group Concatenate

select distinct TRY_CAST(a1.group as varchar(max)) as group,

substring((select distinct ', '+try_cast(a2.delimited field

as varchar(max))

from table_name as a2

where try_cast(a2.group as varchar(max)) = try_cast(a1.group as varchar(max))

order by ', '+try_cast(a2.delimited field

as varchar(max))

for xml path('')),2,8000) as AliasFx

from table name a1

group by cube(a1.group)

order by 1,

AliasFx