Learning Sql Server Joins In Form of Venn Diagrams

Learn Basic Concepts of Sql joins like
Inner Join
Outer Join
Cross Join
Self Join
etc..
in the most simpler manner by pinal dave in the form of venn diagram.
He has explained sql joins with proper examples.. very good article for newbies on sql server

http://dotnetslackers.com/articles/sql/SQL-SERVER-JOINs.aspx