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How to select from DB all records on a certain recursive level

Posted on 2004-04-22
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Last Modified: 2010-04-01
I have a db table like this for a site menu:

site_area
----------------------
id
name
parent_id


How to I select all records that exist on say, the 2nd level?

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Question by:chambers777
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Expert Comment

by:Kuldeepchaturvedi
ID: 10893907
I don't get it..!!
what do you mean by second level???
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Author Comment

by:chambers777
ID: 10893940
There will be a list of values where parent_id will be null.... they are the top level.

There will be a nother list that has parent_id as the id of a record with a null parent_id (this is the second level)... and so on....
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LVL 19

Expert Comment

by:Kuldeepchaturvedi
ID: 10894034
try
SELECT * from table where id IN (select id from table where parent_id=null)
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Kuldeepchaturvedi earned 200 total points
ID: 10894044
ooops sorry
SELECT * from table where parent_id IN (select id from table where parent_id=null)
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Author Comment

by:chambers777
ID: 10894068
I SEE!
what about a third level?
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