Ho to track table structure changes ?

Hi
I need to know how to track the table structure changes ?
I mean how to know when , which column was added/dropped/altered by which user for a table.
Is there any DD view for the same in Oracle??

user572632 wrote:
Hi
I need to know how to track the table structure changes ?
I mean how to know when , which column was added/dropped/altered by which user for a table.
Is there any DD view for the same in Oracle??refer auditing
what is your oracle version?
refer
http://download.oracle.com/docs/cd/B10500_01/server.920/a96524/c25audit.htm
http://www.oracle-base.com/articles/10g/Auditing_10gR2.php
also check trigger,
http://download.oracle.com/docs/cd/B19306_01/server.102/b14200/statements_7004.htm

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