Oracle 11g Release 2

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CREATE TABLE T	("starttime" timestamp, "endtime" timestamp);
INSERT  INTO T ("starttime", "endtime") VALUES ('03-May-2019 08:00:00 AM', '05-May-2019 12:00:00 PM');
1 rows affected

select * from T


starttime
endtime


03-MAY-19 08.00.00.000000 AM
05-MAY-19 12.00.00.000000 PM