Last time the table has been accessed flag

Is there any easier way to "log" when was the last time every table has been accessed than this ones:
-Audit all on every table and just check sys.aud$ when was the last time the table has a session rec (action# = 103)
-Place a trigger on every table to log the last access
If you wonder why I need it is beacause I have around 200 tables, some of them quite heavy, and probably half of them are not being used anymore so I want to backup and delete those tables from the database.
Thanks

Easier than
audit select on table <your_table> by access;and later query DBA_AUDIT_TRAIL?
Don't think so.

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You can do it with 9i
http://www.mpi-inf.mpg.de/departments/d5/teaching/ss05/is05/oracle/server.920/a96521/audit.htm
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AUD

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Hi,
i think database trigger will do better according to your need....
its simple and best.
Just create a new table and database trigger.
Like
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username varchar2(30),
ddl_date date,
ddl_type varchar2(30),
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ddl_date,
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Name Null? Type
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Dear Experts
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Last time the table has been accessed flag

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