Hierarchies
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Ragged Hierarchies
Data Warehousing - Hierarchies | GerardNico.com (BI, OBIEE, OWB,
The page (dw:hierarchie) doesn't exist. You have been redirected automatically to the search engine.Does this resemble your IT person managing your financial master data?
razza dimension server « Ranzal & Associates’ Weblog
Trees in SQL
A set-oriented method for representing trees in SQL that runs orders of magnitude faster than the adjacency list (i.e. child-parent pairs) method.
On its face, the relational database management system would appear to be a very poor tool for representing and manipulating trees. This chapter is designed to accomplish the following things:
Representing Trees in Oracle SQL
Many thanks to RatFace for his article BBS style recursion How-To . I have also recently been wrestling with the concept of displaying heirarchical lists, specifically in a discussion forum tool that I've been writing. I've spent quite a bit of time working out the data structure and display methods for the concept of heirarchical data and I've come to the conclusion that there are four main programming methods to approach the problem:
Four ways to work with hierarchical data | evolt.org
Whether you want to build your own forum, publish the messages from a mailing list on your Website, or write your own cms: there will be a moment that you’ll want to store hierarchical data in a database. And, unless you’re using a XML-like database, tables aren’t hierarchical; they’re just a flat list.
Storing Hierarchical Data in a Database [PHP & MySQL Tutorials]
Possibly, the most difficult problem to support in the relational model is hierarchical data.
Modeling Hierarchies
