CASCADE DELETE N SAME TABLE - SQL Server Forums

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CASCADE DELETE N SAME TABLE

Author

Topic

sateesh.sqldba
Starting Member

25 Posts

Posted - 2010-09-21 : 00:15:20

Hi Experts,

i am having table like

ID NAME PAREND_ID

1 F1 0

2 F2 1
3 F3 1
4 F4 2
5 F5 3

like this i have if i delete parent_ID 1 then i want to delete ID(2,3) because those will become orphans ....

Thank you Inadvance....

sateesh

PavanKK
Starting Member

32 Posts

Posted - 2010-09-21 : 01:36:06

Hi Sateesh,

This will delete recursive childs for given ParentID.

-----------

DECLARE @T TABLE(ID INT,NAME VARCHAR(10),PAREND_ID INT)

INSERT @T VALUES (1,'F1',0)
INSERT @T VALUES (2,'F2',1)
INSERT @T VALUES (3,'F3',1)
INSERT @T VALUES (4,'F4',2)
INSERT @T VALUES (5,'F5',3)
INSERT @T VALUES (6,'F6',0)
INSERT @T VALUES (7,'F7',6)

;WITH Cte AS
(
SELECT 1 AS ID

UNION ALL

SELECT T.ID
FROM @T T
JOIN Cte C ON T.PAREND_ID = C.ID
)

DELETE T
FROM @T T
JOIN Cte C ON T.ID = C.ID

---------

KK

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