How to check the date of last used database?

We have a few databases are not used for a long time. How we can check the last date of use?

I tried scn_to_timestamp (max (ora_rowscn)), does not, because scn_to_timestamp SNA must be not more than 5 days.
I tried DBA_TAB_modifications, but we have not defined monitoring.

Thank you very much

SkyRiver

How we can check the last date of use?

If apps/user to connect through earpiece, you can look in the newspaper of the listener.

Tags: Database

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