14 of 15 SQL Basics with Oracle - Self-joins and multiple joins between the same 2 tables
This video explains what self-joins are and how to create them in an SQL statement through the use of table aliases. Table aliases are also needed whenever 2 tables have two or more relationships between them. (14 of 15) There is also an "Advanced SQL" series. (Search for "databasemec" for tutorials using SQL Server.)
