Como obter os valores da coluna no SQL separados por vírgula

  SELECT
  t1.ID,
  MemberList = substring((SELECT ( ', ' + Value )
                       FROM your_table t2
                       WHERE t1.ID = t2.ID
                       ORDER BY 
                          ID,
                          Value
                       FOR XML PATH( '' )
                      ), 3, 1000 )FROM your_table t1
   GROUP BY ID