Diff between oracle 10g and 11g

Can any one could tell me what is the main diff between oracle 10g and 11g ?
Thanks in Advance
Venkat

Hi,
You can read
http://www.oracle.com/technetwork/articles/sql/index-082320.html
http://www.oracle.com/technetwork/articles/sql/index-099021.html
Anand

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