sql
A Visual Explanation of SQL Joins
I thought Ligaya Turmelle's post on SQL joins [http://www.khankennels.com/blog/index.php/archives/2007/04/20/getting-joins] was a great primer for novice developers. Since SQL joins appear to be set-based, the use of Venn diagrams [http://en.wikipedia.org/wiki/Venn_diagram] to explain