A nice tutorial that explains how to use joins in Oracle with both new and old syntax, visual illustrations, and examples.
http://www.techonthenet.com/oracle/joins.php
There are 4 different types of Oracle joins:
- Oracle INNER JOIN (or sometimes called simple join)
- Oracle LEFT OUTER JOIN (or sometimes called LEFT JOIN)
- Oracle RIGHT OUTER JOIN (or sometimes called RIGHT JOIN)
- Oracle FULL OUTER JOIN (or sometimes called FULL JOIN)