You would have a products table and a vendors table. You would then have a product_x_vendor table which would be the xref. If each vendor had their own unique part number for a given product, the part number would go in the xref table.
My criteria for good software:
  1. Does it work?
  2. Can someone else come in, make a change, and be reasonably certain no bugs were introduced?

In reply to Re: Organizing and presenting a cross-reference by dragonchild
in thread Organizing and presenting a cross-reference by oko1

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