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col c1_dump format a70
col c1 format a35
col funcname format a15

set linesize 200 trimspool on
set pagesize 60

drop table timestamp_test purge;

create table timestamp_test  (
   c1 timestamp
)
/

insert into timestamp_test values(systimestamp );
insert into timestamp_test values(systimestamp - 366);
commit;

select
   'timestamp' funcname, c1, dump(c1) c1_dump
from timestamp_test
union all
select
   'systimestamp' funcname, systimestamp, dump(systimestamp) systimestamp_dump
from dual
/