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Thread: Identical BOM's

  1. #1
    Join Date
    Jul 2003

    Unanswered: Identical BOM's

    I have a Bill Of Materials table with this structure


    Of course, some products can have more parts than others.

    I'm trying to products that have identical BOM's, that is - same parts, and same qty of each part. I've been messing with it for a few hours, and now I don't think it's possible, but figured I'd ask here before I gave up.

    (I'm using SQL Server 2000 if that helps)
    Inspiration Through Fermentation

  2. #2
    Join Date
    Jan 2007
    Jena, Germany
    You can build a single table containing the BOM for all products and add 1 column for the product name if it is not yet in that table. Now you can join this table with itself. The first join checks that for all rows of product1 you will have a matching row for product2. You do the same with product2 -> product1. Whatever remains are the matching products. You may have to count the number of rows for each product before and after the filtering and then compare those numbers to make sure nothing was filtered-out during the row-wise comparison.
    Knut Stolze
    IBM DB2 Analytics Accelerator
    IBM Germany Research & Development

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