Sum for multiple date ranges in a single call?

Question

I have the following query:

SELECT 
   SUM(\"balance_transactions\".\"fee\") AS sum_id 
   FROM \"balance_transactions\" 
   JOIN charges ON balance_transactions         


        

Answer 1

This will return all the month ranges' sum between a given date and today.

Tuples output - SQL Fiddle

select distinct on (s.d)
    s.d as "date",
    sum(bt.fee) over (
        partition by daterange(s.d, (s.d + interval '1 month')::date, '[]')
    ) as sum_id
from
    balance_transactions bt
    inner join
    charges on bt.source = charges.balance_id
    right join
    (
        select d::date as d
        from generate_series (
            '2013-12-20'::date,
            current_date,
            interval '1 day'
        ) s(d)
    ) s on s.d = bt.created
where
    bt.account_id = 6
    and bt.type = 'charge'
    and charges.refunded = false
    and charges.invoice is not null
order by s.d

Array output. Does not work on SQL Fiddle but works in my desktop.

select array_agg(("date", sum_id)) as arr_sum_id
from (
    select distinct on (s.d)
        s.d as "date",
        sum(bt.fee) over (
            partition by daterange(s.d, (s.d + interval '1 month')::date, '[]')
        ) as sum_id
    from
        balance_transactions bt
        inner join
        charges on bt.source = charges.balance_id
        right join
        (
            select d::date as d
            from generate_series (
                '2013-12-20'::date,
                current_date,
                interval '1 day'
            ) s(d)
        ) s on s.d = bt.created
    where
        bt.account_id = 6
        and bt.type = 'charge'
        and charges.refunded = false
        and charges.invoice is not null
    order by s.d
) s