How to get a last DML operation in Oracle 10g-11g
With this query you will see your last DML event by loonking on last change , most recent date is the last operation

  SELECT TABLE_OWNER, 
   TABLE_NAME, 
   INSERTS,
   UPDATES,
   DELETES,
   TIMESTAMP AS `LAST_CHANGE`
FROM  ALL_TAB_MODIFICATIONS
WHERE TO_CHAR(TIMESTAMP,'DD/MM/YYYY') = TO_CHAR(sysdate,'DD/MM/YYYY') 
ORDER BY LAST_CHANGE DESC;




But the only way to use it its separating the DML events in differents querys or adding three differents last_change per dml event.
In any case you tell me your doubts