SELECT t1.CustomerName AS Customer,
STUFF((SELECT ',' + t2.Status AS "text()"
FROM dbo.Customers t2
WHERE t2.CustomerName = t1.CustomerName
ORDER BY t2.Status
FOR XML PATH(''),TYPE).value('./text()[1]','varchar(1000)'),1,1,'') AS Relations
FROM dbo.Customers t1
GROUP BY t1.CustomerName
ORDER BY t1.CustomerName;