SELECT 
     REVERSE(PARSENAME(REPLACE(REVERSE(myAddress), ',', '.'), 1)) AS [Street]
   , REVERSE(PARSENAME(REPLACE(REVERSE(myAddress), ',', '.'), 2)) AS [City]
   , REVERSE(PARSENAME(REPLACE(REVERSE(myAddress), ',', '.'), 3)) AS [State]
FROM dbo.custAddress;
GO