Oracle Documentation Links

Few good oracle documentation links we can learn pretty much oracle by self,

Oracle® Server Concepts
http://docs.oracle.com/cd/E11882_01/server.112/e25789/toc.htm

Oracle® 2-Day Developers Guide
http://docs.oracle.com/cd/E11882_01/appdev.112/e10766/toc.htm

Oracle® Database 2 Day DBA
http://docs.oracle.com/cd/E11882_01/server.112/e10897/toc.htm

Oracle® Database 2 Day + Performance Tuning Guide

http://docs.oracle.com/cd/E11882_01/server.112/e10822/toc.htm