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

Try this:

create table timeframes (
    start_dt date,
    end_dt date
);

insert into timeframes values ('2013-12-20', '2014-01-19');
insert into timeframes values ('2013-12-21', '2014-01-20');
insert into timeframes values ('2013-12-22', '2014-01-21');
insert into timeframes values ('2013-12-23', '2014-01-22');
insert into timeframes values ('2013-12-24', '2014-01-23');

SELECT 
    tf.start_date, 
    tf.end_date, 
    SUM(CASE 
        WHEN t.created BETWEEN tf.start_date AND tf.end_date THEN t.fee
        ELSE 0.00 
    END) as transaction_sum
FROM 
    balance_transactions t
INNER JOIN 
    charges c
ON 
    t.source = c.balance_id 
INNER JOIN 
    timeframes tf
ON 
    t.created BETWEEN tf.start_date AND tf.end_date
WHERE 
    t.account_id = 6
AND 
    (
    t.type = 'charge' 
        AND 
    c.refunded = false 
        AND 
    c.invoice IS NOT NULL
    ) 
GROUP BY
    tf.start_date, 
    tf.end_date