Helmut Daiminger wrote:
>
> Hi!
>
> I have a SQL problem here, which I can't solve.
>
> I have a B-tree structure in a table (parentID, childID).
>
> If a parent has kids then select those kids. If not, select this parent.
>
> How do I code this in SQL? I tried using "connect by" but this doesn't
> include start point.
>
> Any idea?
>
> This is 8.1.6 on Win2k.
>
> Thanks,
> Helmut
>
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.com
> --
> Author: Helmut Daiminger
> INET: [EMAIL PROTECTED]
select t.id, t.name
from your_table t
where t.id = what you are looking for
and not exists (select null
from your_table t2
where t2.parent_id = t.id)
union
select t.id, t.name
from your_table t
where t.parent_id = what you are looking for
Index on parent_id, please.
Stephane Faroult
Oriole Corporation
Voice: +44 (0) 7050-696-269
Fax: +44 (0) 7050-696-449
Performance Tools & Free Scripts
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--
Please see the official ORACLE-L FAQ: http://www.orafaq.com
--
Author: Stephane Faroult
INET: [EMAIL PROTECTED]
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