Re: Nested database loops and completing an unordered list....

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On Fri, Mar 2, 2012 at 7:43 AM, Jay Blanchard
<jay.blanchard@xxxxxxxxxxxxxxxxxxx> wrote:
>> My usual approach to a problem like this to to includes a parent column in the table
>>
>> ID (int pk)
>> Parent ( default null ) // no parent
>> Item
>> Itemtype
>> [etc]
>>
>> Parent will then hold either a null if a top level item, or a structured path ( 1/10/24 ) that notes the parents of the item all the way up to the parent. That way, a single query will get you all items in that parent's lineage to whatever depth is needed by using the child's value
>>
>> Select * from table where parent = '1/10'
>>
>> Would retrieve all items that are children of a top level of 1 and a second level of 10
>
> I would do that under normal circumstance but I cannot modify the client's table in any way shape or form. I am considering the COMPANY_ID to be the parent at this point and I can get all who belong to a company. I just need to turn that lineage into a tree.


Would they let you make a copy or a join table where you could build
what you need? Then maybe add a stored proc to move data as needed
-- 

Bastien

Cat, the other other white meat

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