How to get date of last table change (DML) ?

In Oracle 7.3.3 and 8 I would like to know when a table was last changed due to an insert, update or delete. I know about last_ddl_time, but I can not find an equivalent for the last DML time.

Is it avaliable somewhere? Or do I need a trigger, or enable audit trails, to keep track of that?

Thanks,
Arjan. Received on Wed Jul 15 1998 - 15:01:30 CDT