A Visual Explanation of SQL Joins - Coding Horror
https://blog.codinghorror.com/a-visual-explanation-of-sql-joins/
Oct 11, 2007 · 11 Oct 2007 A Visual Explanation of SQL Joins. I thought Ligaya Turmelle's post on SQL joins was a great primer for novice developers. Since SQL joins appear to be set-based, the use of Venn diagrams to explain them seems, at first blush, to be a natural fit. However, like the commenters to her post, I found that the Venn diagrams didn't quite match the SQL join …
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