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hierarchy delete

Posted on 2013-11-29
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Last Modified: 2013-12-13
Hello,
How can I delete hierarchy from the root down? ParentId refers to Id from another row.
In the example below I would want to delete first 3 rows by passing in Id=1

DECLARE @Table table(Id int, ParentId int, MyText varchar(50))

INSERT INTO @Table(Id, ParentId, MyText) values(1,0,'One')
INSERT INTO @Table(Id, ParentId, MyText) values(2,1,'1.1')
INSERT INTO @Table(Id, ParentId, MyText) values(3,2,'1.1.1')
INSERT INTO @Table(Id, ParentId, MyText) values(4,0,'Two')
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Question by:johnson1
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1 Comment
 
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Accepted Solution

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Lowfatspread earned 500 total points
ID: 39685441
use a recursive cte

;with cte as (
  select a.*
    from @table
    where id=1
  union all
  select a.*
    from @table as a
   Inner join cte as b
      on a.id=b.parentid
  )
 Delete x
   from @table as X
   Inner join CTE
     on x.id=cte.id
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