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Q&A for those committed to a vegan or vegetarian lifestyle and anyone interested in learning more

declare @T table(ID int, ParentID int, DATA char(1));

insert into @T values
(1,             -1,             'a'),
(2,              1,             'b'),
(3,              2,             'c'),
(4,              3,             'd'),
(5,              3,             'f');

declare @ID int = 2;

with C as
  select ID, ParentID, DATA
  from @T
  where ID = @ID
  union all
  select T.ID, T.ParentID, T.DATA
  from @T as T
    inner join C 
      on T.ParentID = C.ID
select ID, ParentID, DATA
from C

Enter Parameters

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