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A pretty good visualization for SQL joins

Every once in a while I have to do an unusual join in SQL and I can’t exactly remember what join type to use. I found this blog post and I think it perfectly visualizes the different types of joins, without a lot of text and fluff. Plus it references pirates and ninjas. What more do you want?!

http://www.codinghorror.com/blog/archives/000976.html (pdf)

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