FORMATING SELECT - sql

Question

I have a select which shows me how much lasts a process, it looks like:
SELECT
info1,
info2,
ifno3...
(DATE,'DD.MM.YYYY')DAY,
to_char(DATE,'HH24:MI') hour_from,
to_char(DATE_UNTIL,''HH24:MI'')hour_until,
REGEXP_SUBSTR((date_until-date)DAY TO SECOND,'d{2}:\d{2}')lasts_time
.....
and if a process lasts for example from 09.06.2021 23:00 to 10.06.2021 07:00, then the output of query from above will be:
info1 info2 info3 DAY hour_from hour_until lasts_time
info1| info2 |info3 |09.06.2021 |23:00 | 07:00 | 08:00
and i want it to change in
if this process lasts over night, then the output should be something like this:
info1 info2 info3 DAY hour_from hour_until lasts_time
info1| info2 |info3 |09.06.2021 |23:00 | 00:00 | 01:00
info1| info2 |info3 |10.06.2021 |00:00 | 07:00 | 07:00
so it will count only until the day ends, and if the process is still on going in the new day the output will come in a new row,
I think I have here to deal with union all, but I'm not sure, if anyone has any idea would be great

Answer 1

Here's one option. Read comments within code.
SQL> with
2 test (id, info1, date_from, date_to) as
3 -- sample data
4 (select 1, 'info1', to_date('09.06.2021 23:00', 'dd.mm.yyyy hh24:mi'),
5 to_date('10.06.2021 07:00', 'dd.mm.yyyy hh24:mi')
6 from dual
7 ),
8 temp as
9 -- row generator, to generate all hours between DATE_FROM and DATE_TO
10 (select id, info1,
11 date_from + (level - 1) / 24 datum,
12 lead(date_from + (level - 1) / 24) over (order by date_from) next_datum
13 from test
14 connect by level <= (date_to - date_from) * 24 + 1
15 ),
16 temp2 as
17 -- find date boundaries (MINDAT and MAXDAT), as well as duration in between (LASTS_TIME)
18 (select id, info1, datum, next_datum,
19 min(datum) mindat,
20 max(case when to_char(next_datum, 'mi') = '00' then next_datum - 1/(24*60*60)
21 else datum
22 end
23 ) maxdat,
24 --
25 round((max(case when to_char(next_datum, 'mi') = '00' then next_datum - 1/(24*60*60)
26 else datum
27 end
28 ) -
29 min(datum)
30 ) * 24) lasts_time
31 from temp
32 group by id, info1, datum, next_datum
33 )
34 -- the final result
35 select id,
36 info1,
37 to_char(datum, 'dd.mm.yyyy') day,
38 min(to_char(datum, 'hh24:mi')) hour_from,
39 max(to_char(next_datum, 'hh24:mi')) hour_until,
40 sum(lasts_time) lasts_time
41 from temp2
42 group by id, info1,
43 to_char(datum, 'dd.mm.yyyy')
44 order by day;
The result is
ID INFO1 DAY HOUR_FROM HOUR_UNTIL LASTS_TIME
---------- ----- ---------- ---------- ---------- ----------
1 info1 09.06.2021 23:00 00:00 1
1 info1 10.06.2021 00:00 07:00 7
SQL>
For #astentx's comment: there's no endless loop in my case for values you suggested:
SQL> set timing on
SQL> with
2 test (id, info1, date_from, date_to) as
3 -- sample data
4 (select 1, 'info1', to_date('10.06.2021 07:00', 'dd.mm.yyyy hh24:mi'),
5 to_date('11.06.2021 07:00', 'dd.mm.yyyy hh24:mi')
6 from dual
7 ),
<snip>
ID INFO1 DAY HOUR_ HOUR_ LASTS_TIME
---------- ----- ---------- ----- ----- ----------
1 info1 10.06.2021 07:00 23:00 17
1 info1 11.06.2021 00:00 07:00 7
Elapsed: 00:00:00.04
SQL>

Answer 2

You can use recursive CTE to generate required amount of rows (which are equal to days distance between dates).
with a as (
select
'info1' as id
, to_date('2021-05-01 10:20:30') as dt_from
, to_date('2021-05-03 07:08:09') as dt_to
from dual
union all
select
'info2'
, to_date('2021-05-02 05:06:07')
, to_date('2021-05-02 10:20:30')
from dual
)
, b(id, dt_from, dt_to, dt) as (
select
id
, dt_from
, dt_to
, trunc(dt_from)
from a
union all
select
id
, dt_from
, dt_to
, dt + 1
from b
where dt < trunc(dt_to)
)
select
id
, dt
, numtodsinterval(
case
when trunc(dt_to) = dt
then dt_to
else dt + 1
end
-
greatest(dt_from, dt)
, 'DAY') as dur_interval
/*Or any rounding function you need*/
, trunc((case
when trunc(dt_to) = dt
then dt_to
else dt + 1
end
-
greatest(dt_from, dt))*24) as dur_hours
, case
when trunc(dt_from) = dt
then to_char(dt_from, 'hh24:mi')
else '00:00'
end as hour_from
, case
when trunc(dt_to) = dt
then to_char(dt_to, 'hh24:mi')
else '23:59'
end as hour_to
from b
order by
id
, dt
ID | DT | DUR_INTERVAL | DUR_HOURS | HOUR_FROM | HOUR_TO
:---- | :------------------ | :---------------------------- | --------: | :-------- | :------
info1 | 2021-05-01 00:00:00 | +000000000 13:39:30.000000000 | 13 | 10:20 | 23:59
info1 | 2021-05-02 00:00:00 | +000000001 00:00:00.000000000 | 24 | 00:00 | 23:59
info1 | 2021-05-03 00:00:00 | +000000000 07:08:09.000000000 | 7 | 00:00 | 07:08
info2 | 2021-05-02 00:00:00 | +000000000 05:14:23.000000000 | 5 | 05:06 | 10:20
db<>fiddle here