Microsoft SQL Server 2008 R2 (RTM) - 10.50.1617.0 (X64)   Apr 22 2011 19:23:43
Copyright (c) Microsoft Corporation  Express Edition with Advanced Services (64-bit) on
Windows NT 6.1 <X64> (Build 7601: Service Pack 1)

GO
ALTER FUNCTION [dbo].[GetRoot]
(
    @Param1 int
)
RETURNS varchar(50)
AS
BEGIN
DECLARE @ReturnValue varchar(50)
with results as
    (
        select parentouid,net_ouid from net_ou where net_ouid=@Param1
        union all
        select t2.parentouid,t2.net_ouid from net_ou t2
        inner join results t1 on t1.parentouid = t2.net_ouid where t2.parentouid <> t1.net_ouid
    )
    select @ReturnValue = net_ou.displayname
    from  NET_OU RIGHT OUTER JOIN
    results ON net_ou.net_ouid = results.ParentouID where results.parentouid=results.net_ouid

    RETURN @ReturnValue

END

;with results as
    (
        select parentouid,net_ouid from net_ou where net_ouid=@Param1
        union all
        select t2.parentouid,t2.net_ouid from net_ou t2
        inner join results t1 on t1.parentouid = t2.net_ouid where t2.parentouid <> t1.net_ouid
    )

;with results as
    (
        select parentouid,net_ouid from net_ou where net_ouid=@Param1
        union all
        select t2.parentouid,t2.net_ouid from net_ou t2
        inner join results t1 on t1.parentouid = t2.net_ouid where t2.parentouid <> t1.net_ouid
    )
    select @ReturnValue = net_ou.displayname
    from  NET_OU RIGHT OUTER JOIN
    results ON net_ou.net_ouid = results.ParentouID where results.parentouid=results.net_ouid

    RETURN @ReturnValue

END