Tricky Hierarchical Query

From: Walter K <alden14004_at_yahoo.com>
Date: Fri, 31 Aug 2001 11:04:32 -0700
Message-ID: <F001.0037FB9C.20010831110704@fatcity.com>

Hi,

I am stumped on how to do a particular hierarchical query. The query needs to be written entirely in SQL.

I have a table (ACCOUNT) with 3 columns of interest in it, ACCOUNT_ID, ROOT_ID, PARENT_ID. Every row represents an account. If an account is the "root"
(top-most), then the ROOT_ID and PARENT_ID columns are
null. If an account is a "parent", then the ROOT_ID is populated but the PARENT_ID is null. Accounts can be nested multiple levels deep.

I need to find all of the accounts that belong to the root of the given account but not include any accounts that are children of the given account. Does this make sense?

I.e.          5
          6       7
       8     9      10
    11   12    13      14

I'm not sure if my tree diagram will be dispalyed properly after I email this but in essence if "8" is the given account number, I want everything returned except for 8, 11 and 12.

Thanks in advance!
-w

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Author: Walter K
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Received on Fri Aug 31 2001 - 13:04:32 CDT