Genereer volgorde van datums en tijd

Ik denk dat je de lag-functie en partitie wilt gebruiken door dt... Ik hoop dat dit helpt.

with par as (
  select date '2015-08-07' enddate, 4 LookBackDays, 3600 inteval, 'Bob' Name, 
         '09:00' open, '14:00' close from dual),
t1 as (
  select to_char(enddate-level+1, 'yyyy-mm-dd') dt, name, open, close from par
    connect by level <= LookBackDays + 1 ),
t2 as (
  select to_char(to_date(open, 'hh24:mi') + (level) * inteval / (24*60*60), 'hh24:mi') tm
    from par
    connect by to_date(open, 'hh24:mi') + level * inteval / (24*60*60) 
               <= to_date(close, 'hh24:mi') )
select to_date(dt, 'yyyy-mm-dd') dt, 
       lag(to_date(dt||' '||tm, 'yyyy-mm-dd hh24:mi'), 1,to_date(dt||' '||open, 'yyyy-mm-dd hh24:mi'))over(partition by to_date(dt||' '||open, 'yyyy-mm-dd hh24:mi') order by tm) open,  
       to_date(dt||' '||close, 'yyyy-mm-dd hh24:mi') close, name, 
       to_date(dt||' '||tm, 'yyyy-mm-dd hh24:mi') IntervalEnd
from t1 cross join t2 order by dt, tm