Im having a trouble with an already answered question in stackoverflow itself (Question before). So Im just repeating the question with some changes and a trouble in it because of a root element
I have an SQL table like this
ID Name ParentID
------------------------------
0 Users NULL
1 Alex 0
2 John 0
3 Don 1
4 Philip 2
5 Shiva 2
6 San 3
7 Antony 6
8 Mathew 2
9 Cyril 8
10 Johan 9
-------------------------
Am looking for an out put like this
if I pass the ID 7,10,1
The out put table will be
ID Name Relation
------------------------------------
7 Antony Alex->Don->San->Antony
10 Johan John->Mathew->Cyril->Johan
1 Alex -
From the above answer what I was trying to emphasis is it should not consider the top most node Users whose ID is 0 and parentid is null. So for ID 1, it returned just an empty string for relation or just hyphen (-) How can I achieve that using CTE
Based on prev answer:
DECLARE @t table (ID int not null, Name varchar(19) not null, ParentID int null)
insert into @t(ID,Name,ParentID) values
(1 ,'Alex',null),
(2 ,'John',null),
(3 ,'Don',1),
(4 ,'Philip',2),
(5 ,'Shiva',2),
(6 ,'San',3),
(7 ,'Antony',6),
(8 ,'Mathew',2),
(9 ,'Cyril',8),
(10,'Johan',9)
declare @search table (ID int not null)
insert into @search (ID) values (7),(10), (1);
;With Paths as (
select s.ID as RootID,t.ID,t.ParentID,t.Name
, CASE WHEN t.ParentId IS NULL THEN '-'
ELSE CONVERT(varchar(max),t.Name) END as Path
from @search s
join @t t
on s.ID = t.ID
union all
select p.RootID,t.ID,t.ParentID,p.Name, t.Name + '->' + p.Path
from Paths p
join @t t
on p.ParentID = t.ID
)
select *
from Paths
where ParentID is null;