Can SQL Server views have primary and foreign keys

SELECT MAX(...) ... GROUP BY ...

ALTER VIEW [dbo].[ViewName]
AS

SELECT
ISNULL(CAST(
        CASE ROW_NUMBER() OVER (ORDER BY columnNames)
            WHEN ROW_NUMBER() OVER (ORDER BY columnNames) THEN ROW_NUMBER() OVER (ORDER BY columnNames)
            ELSE 0
        END AS int), 0) AS ID