How misuse DELETE to delete the ORACLE data tables Office

FLASHBACK use of technology, query data in this form in the past a certain time, for example:

SELECT * FROM aaa as of timestamp to_timestamp('2019-05-28 10:00:00','yyyy-MM-dd hh:mI:ss')；

Or query data from the current time, a few minutes before, 1440 is the number of minutes a day.

SELECT * FROM aaa as of timestamp to_timestamp(systimestamp- 10/1440)

 

With query results can retrieve the deleted data