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Why Venn Diagrams Don't Work for Data -- BeyeNETWORK →
I am sure this is a very intuitive topic for all data professionals, but I think this article provides a very clear explanation of the complexities in dealing with more complicated data relationship and management issues.
Figure 4: Attempt at Venn Diagram for Records in Figure 3
Figure 4 is not a Venn diagram in any real sense. It violates the principles of a Venn diagram for two main reasons: the existence of duplicates, and the existence of nulls. Neither of these occur in reality – which is what the Venn diagram is based on – but they do occur in data
