The above methods can be used after the fact. Before the fact, you can add a column to the table called UPDATE_TIME...
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defined with the DATE datatype. Then create a trigger on the table which sets the UPDATE_TIME column to SYSDATE on any INSERT or UPDATE command on the table. Determining the last updated row is as simple as querying for the row with the MAX(UPDATE_TIME) value. This method does require you to set up the column and trigger beforehand.
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