Use a CTE to traverse to 2nd level in tree - sql

Question

I'm trying to use a CTE to traverse a tree in SQL Server. Ideally what I would like as output is a table which shows for each node in the tree the corresponding node that is second from the top in the tree.
I have some basic code to traverse the tree from a given node, but how can I modify it so it produces the desired output ?
DECLARE #temp TABLE
(
Id INT
, Name VARCHAR(50)
, Parent INT
)
INSERT #temp
SELECT 1,' Great GrandFather Thomas Bishop', null UNION ALL
SELECT 2,'Grand Mom Elian Thomas Wilson' , 1 UNION ALL
SELECT 3, 'Dad James Wilson',2 UNION ALL
SELECT 4, 'Uncle Michael Wilson', 2 UNION ALL
SELECT 5, 'Aunt Nancy Manor', 2 UNION ALL
SELECT 6, 'Grand Uncle Michael Bishop', 1 UNION ALL
SELECT 7, 'Brother David James Wilson',3 UNION ALL
SELECT 8, 'Sister Michelle Clark', 3 UNION ALL
SELECT 9, 'Brother Robert James Wilson', 3 UNION ALL
SELECT 10, 'Me Steve James Wilson', 3
;WITH cte AS
(
SELECT Id, Name, Parent, 1 as Depth
FROM #temp
WHERE Id = 8
UNION ALL
SELECT t2.*, Depth + 1 as 'Depth'
FROM cte t
JOIN #temp t2 ON t.Parent = t2.Id
)
SELECT *
, MAX(Depth) OVER() - Depth + 1 AS InverseDepth
FROM cte
As output I would like something like
Id Name depth2_id depth2_name
8 Sister Michelle .. 2 Grand Mom Elian ....
7 Brother David .. 2 Grand Mom Elian ....
4 Uncle Michael .. 2 Grand Mom Elian ...
Thanks for any tips or pointers.

Answer 1

a bit hard to get what your goal, but you can use smth like this:
;with cte AS
(
select
t.Id, t.Name, t.Parent, 1 as Depth,
null as Depth2Parent
from #temp as t
where t.Parent is null
union all
select
t.Id, t.Name, t.Parent, c.Depth + 1 as 'Depth',
isnull(c.Depth2Parent, case when c.Depth = 1 then t.Id end) as Depth2Parent
from cte as c
inner join #temp as t on t.Parent = c.Id
)
select *
from cte
sql fiddle demo