Преобразуване на unix timestamp в Date и DateTime - SQL/ORACLE

select to_date('01/01/1970','mm/dd/yyyy') + numtodsinterval(1456342438,'SECOND'), 
TRUNC(to_date('01/01/1970','mm/dd/yyyy') + numtodsinterval(1456342438,'SECOND')) from dual;

Това проработи.