I want set data in table with tree structure.
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
How can I get path of node from root for specific nodes?
For example result for Id IN (2, 5, 10)
is :
Id Result
2 Great GrandFather Thomas Bishop -> Grand Mom Elian Thomas Wilson
5 Great GrandFather Thomas Bishop -> Grand Mom Elian Thomas Wilson -> Aunt Nancy Manor
10 Great GrandFather Thomas Bishop -> Grand Mom Elian Thomas Wilson -> Dad James Wilson -> Me Steve James Wilson
For one id I use this T-SQL code, Please complete it :
;WITH cte AS
(
SELECT *, t = 1
FROM @temp
WHERE Id = 10 -- <-- your id
UNION ALL
SELECT t2.*, t + 1
FROM cte t
JOIN @temp t2 ON t.Parent = t2.Id
)
SELECT STUFF((
SELECT ' -> ' + Name
FROM cte
ORDER BY t DESC
FOR XML PATH(''), TYPE).value('.', 'VARCHAR(MAX)'), 1, 4, '')
Go
When I use FOR XML PATH('')
speed is low, how can I use your T-SQL code without it?
How about this:
;WITH cte AS
(
SELECT *, t = 1, cast(name as varchar(max)) n2, id grp
FROM @temp
WHERE Id in (2,5,10) -- <-- your id
UNION ALL
SELECT t2.*, t + 1, coalesce(t2.name + ' -> ' + t.n2, t.n2), t.grp
FROM cte t
JOIN @temp t2 ON t.Parent = t2.Id
), cte2 as
(
SELECT grp, n2 result, row_number() over (partition by grp order by t desc) rn from cte
)
SELECT grp id, result from cte2 WHERE rn = 1
Result:
id result
2 Great GrandFather Thomas Bishop -> Grand Mom Elian Thomas Wilson
5 Great GrandFather Thomas Bishop -> Grand Mom Elian Thomas Wilson -> Aunt Nancy Manor
10 Great GrandFather Thomas Bishop -> Grand Mom Elian Thomas Wilson -> Dad James Wilson -> Me Steve James Wilson
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