SQL - dynamic sum based on dynamic date range - sql

Question

I'm new to SQL and I'm not even sure if what I am trying to achieve is possible.
I have two tables. The first gives an account number, a 'from' date and a 'to' date. The second table shows monthly volume for each account.
Table 1 - Dates
Account# Date_from Date_to
-------- --------- -------
123 2018-01-01 2018-12-10
456 2018-06-01 2018-12-10
789 2018-04-23 2018-11-01
Table 2 - Monthly_Volume
Account# Date Volume
--------- ---------- ------
123 2017-12-01 5
123 2018-01-15 5
123 2018-02-05 5
456 2018-01-01 10
456 2018-10-01 15
789 2017-06-01 5
789 2018-01-15 10
789 2018-06-20 7
I would like to merge the two tables in such a way that each account in Table 1 has a fourth column that gives the sum of Volume between Date_from and Date_to.
Desired Result:
Account# Date_from Date_to Sum(Volume)
-------- --------- ------- -----------
123 2018-01-01 2018-12-10 10
456 2018-06-01 2018-12-10 15
789 2018-04-23 2018-11-01 7
I believe that this would be possible to achieve for each account individually by doing something like the following and joining the result to the Dates table:
SELECT
Account#,
SUM(Volume)
FROM Monthly_Volume
WHERE
Account# = '123'
AND Date_from >= TO_DATE('2018-01-01', 'YYYY-MM-DD')
AND Date_to <= TO_DATE('2018-12-10', 'YYYY-MM-DD')
GROUP BY Account#
What I'd like to know is whether it is possible to achieve this without having to individually fill in the Account#, Date_from and Date_to for each account (there are ~1,000 accounts), but have it be done automatically for each entry in the Dates table.
Thank you!

Answer 1

You should be able to use join and group by:
select d.account#, d.Date_from, d.Date_to, sum(mv.volume)
from dates d left join
monthly_volume mv
on mv.account# = d.account# and
mv.date between d.Date_from and d.Date_to
group by d.account#, d.Date_from, d.Date_to;