How I can substract one timestamp from another in Oracle

How can I subtract one timestamp from another in Oracle?

for example I have:

timestamp_1 = 2021-06-25 08:18:17,207141
timestamp_2 = 2021-06-24 17:41:06,787111

how I can take a different between?

I need a diff in seconds

>Solution :

You can simply subtract the two values from each other

SELECT   TO_TIMESTAMP ('2021-06-25 08:18:17,207141', 'YYYY-MM-DD HH24:MI:SS,FF')
       - TO_TIMESTAMP ('2021-06-24 17:41:06,787111', 'YYYY-MM-DD HH24:MI:SS,FF')
  FROM DUAL;


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