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Re: Implementing an ordered tree

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Re: Implementing an ordered tree

Subject: Re: Implementing an ordered tree
From: Arturo Perez <email@hidden>
Date: Mon, 23 Jan 2006 11:10:54 -0500

Karoly Szantai wrote:

Hello,
I have a Category entity. Each Category has zero or more subcategories, which are ordered. There is a root Category (called main category) which has no parent.

There's a guy named Joe Celko who has a bunch of suggestions on how to do trees in relational databases. You may want to take a look at his algorithms.

Other than that, is the ordering a user-ordering or a tree-ordering? That is, is the order for organizing the display or some characteristic of the tree?

-arturo

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  >Implementing an ordered tree (From: Karoly Szantai <email@hidden>)




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