oracle current timestamp

-- In SESSION time zone
SELECT current_timestamp FROM dual;     -- 2021-05-07 05:36:57.476000
SELECT current_timestamp(2) FROM dual;  -- 2021-05-07 05:36:57.470000
SELECT current_date FROM dual;          -- 2021-05-07 05:36:57
-- In SYSTEM on which database resides
SELECT systimestamp FROM dual;          -- 2021-05-07 07:36:57.762000 +02:00
SELECT sysdate FROM dual;               -- 2021-05-07 07:36:57

to_timestamp('2022-03-12 21:24:00', 'yyyy-mm-dd hh24:mi:ss')
to_date('2022-03-12 21:24:00', 'yyyy-mm-dd hh24:mi:ss')