Sql query for filtering a record

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Hi, I have a table "Demo" which has following record,

GroupId     GroupName                                          ParentGroupId IsADGroup
----------- -------------------------------------------------- ------------- ---------
1           Default                                            NULL          0
6           Hs-First Floor                                     1             0
7           Hs-First Floor-1                                   6             0
8           Hs-Second Floor                                    6             0
9           Hs-Third Floor                                     6             0
10          Hs-Second Floor-1                                  8             0
11          Hs-Second Floor -1-1                               10            0

In these while editing I want to get those record whose group id & parent group id is
not in that record.

for Example: Suppose I want to edit Hs- first Floor (Group Id=6) in that case Based on that id,
I want to show a record whose parentid & group id is not a "6" and also I don't want to show group id="10" & "11" .because his parent id="8 and 10", and "8 and 10 has parent id=6."
So, here expected result should be 1 Default NULL 0

Posted 6-May-13 0:25am

vaibhav10Dec1987

Updated 6-May-13 0:56am

Aarti Meswania

v2

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Ali Reza Barkhordari 6-May-13 6:44am

you must use a recursive query to do this.

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Amol_B · Answer 1 · 2013-05-06T19:02:00

Hello Vaibhav,

Adding a recursion will be one way..

i tried to create a solution which will avoid recursion as below

SQL

SELECT DISTINCT A.* from Demo A LEFT JOIN DEMO B ON A.GroupID !=  B.ParentGroupId
WHERE ISNULL(A.ParentGroupId,-99) != 6 AND ISNULL(A.ParentGroupId,-99) NOT IN ( SELECT DISTINCT A.GroupID from Demo A LEFT JOIN DEMO B ON A.GroupID =  B.ParentGroupId WHERE B.ParentGroupId !=6)

Hope that it should solve your problem(i know it looks weird but for sake of avoiding recursion it can be used)

Please mark it as answer if this seems correct to you