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I need to pull out down long tree of tables to bottom

I need to pull out down long tree of tables to bottom

I need to pull out down long tree of tables to bottom

I have a tree of tables.
At the top is a particular complete object, say a building. that table only lists the item's name, price and category. This item is derived from a table that lists all of the sub-assemblies that make up the item, say a wall. Those sub assemblies are used in many different final objects. Each of those sub-assemblies are made up of individual parts, say a board, that come from a separate table with exact individual part information.

I need to extract the full series from the top to the bottom. I do not need all the details, just the more general stuff such as a wall, with so many boards of this type, etc.

I am just going to start this, but should I try to do this from the database side or the application side (perl)?
I see advantages for both sides,any opinions?

I will be slow to respond to questions as I will be away from the internet a lot this week. Thanks

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