Oracle 18c

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create table table1 (STATUS_TIMSTM  TIMESTAMP(6),
CREATED_TIMSTM  TIMESTAMP(6) default SYSTIMESTAMP ,
UPDATED_TIMSTM   TIMESTAMP(6));
INSERT INTO table1 ("STATUS_TIMSTM","UPDATED_TIMSTM")
VALUES(TIMESTAMP '2020-12-10 00:00:00', TIMESTAMP '2020-06-15 00:00:00');
1 rows affected

Select * from table1;


STATUS_TIMSTM
CREATED_TIMSTM
UPDATED_TIMSTM


10-DEC-20 00.00.00.000000
16-JUL-25 15.45.28.081945
15-JUN-20 00.00.00.000000