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A comment on Ask HN: What are some examples of good database schema designs?. Parent comment

Re:Ask HN: What are some examples of good database schema de... by edejong on Friday February 14, 2020 @08:10AM (#22326164)
As such, it helps to also study 4NF and 5/6NF (which are temporal normalisations). This allows us to refer a sale to an earlier 'version' of the product.
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