Home Forums Article Discussions Article Discussions by Author Discuss Content Posted by Jeff Moden Displaying Sorted Hierarchies (SQL Spackle) RE: Displaying Sorted Hierarchies (SQL Spackle)

  • August 17, 2013 at 12:50 pm

    #1642430

    Just in case those that already responded on this thread haven't seen them, the articles that I was talking about writing came out a while ago. Here are the links.

    For some very high performance methods for building/maintaining (54 seconds for a million node hierarchy) from an Adjacency List and using Nested Sets in conjunction with both an Adjacency List and a Hierarchical Path all in one table, please see the following article.

    [font="Arial Black"]Hierarchies on Steroids #1: Convert an Adjacency List to Nested Sets[/font][/url]

    For information on how to build a pre-aggregated hierarchical table (again... only takes about a minute) that answers for most of the things you'd ever query a hierarchical table for (MLM'ers will love this one), please see the following article.

    [font="Arial Black"]Hierarchies on Steroids #2: A Replacement for Nested Sets Calculations[/font][/url]

    --Jeff Moden

    RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
    First step towards the paradigm shift of writing Set Based code:
    ________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.

    Change is inevitable... Change for the better is not.

    Helpful Links:
    How to post code problems
    How to Post Performance Problems
    Create a Tally Function (fnTally)