Sql Hierarchy ID tri par niveau

--Est-ce que ça va marcher? ceci est tiré de Arbre de tri avec autre colonne dans SQL Server 2008

DECLARE @table TABLE (id INT NOT NULL PRIMARY KEY, name NVARCHAR(4000) NOT NULL, path HIERARCHYID)

INSERT
INTO    @table
VALUES  
        (1, 'People', '/'),
        (2, 'Girls', '/1/'),
        (3, 'Boys', '/2/'),
        (4, 'Zoey', '/1/1/'),
        (5, 'Kate', '/1/2/'),
        (6, 'Monica', '/1/3/'),
        (7, 'Mark', '/2/1/'),
        (8, 'David', '/2/2/')

;WITH   q AS
        (
        SELECT  *, HIERARCHYID::Parse('/') AS newpath
        FROM    @table
        WHERE   path = HIERARCHYID::GetRoot()
        UNION ALL
        SELECT  t.*, HIERARCHYID::Parse(q.newpath.ToString() + CAST(ROW_NUMBER() OVER (ORDER BY t.name) AS NVARCHAR(MAX)) + '/')
        FROM    q
        JOIN    @table t
        ON      t.path.IsDescendantOf(q.path) = 1
                AND t.path.GetLevel() = q.path.GetLevel() + 1
        )
SELECT  replicate(convert(nvarchar, '-'), q.path.GetLevel()) + q.name /*+ '(' + q.newpath.ToString() + ')'*/
FROM    q
ORDER BY
        newpath