SQL for multiple sums and divides under the same query - sql

Question

We want to extract through a sql query the results from the division of each one of multiple sums divided by their counterpart divider, which is also a sum coming from another column under the same DB.
e.g: sum (cross_border_approved_volume)/ sum (cross_border_transaction_count), then sum (domestic_approved_volume)/ sum (domestic_transaction_count), etc.
I'm trying something like the below, but it doesn't seem to have the correct syntax to do this and I'm not sure what to change.
select((select sum(cross_border_approved_volume) as cross_border_approved_volume,
sum(domestic_approved_volume) as domestic_approved_volume,
sum(consumer_approved_volume) as consumer_approved_volume
from rmd_owner.ica_dimension_aggregate
where issuer_id in (41, 42, 43)
and bin8 = -1
/ (select sum(cross_border_transaction_count) as cross_border_transaction_count,
sum(domestic_transaction_count) as domestic_transaction_count,
sum(consumer_transaction_count) as consumer_transaction_count
from rmd_owner.ica_dimension_aggregate
where issuer_id in (41, 42, 43)
and bin8 = -1))) as result;
Thank you.

Answer 1

You could do something like this (SQL Server syntax):
;with cte as (select
sum(cross_border_approved_volume) as cross_border_approved_volume,
sum(domestic_approved_volume) as domestic_approved_volume,
sum(consumer_approved_volume) as consumer_approved_volume,
sum(cross_border_transaction_count) as cross_border_transaction_count,
sum(domestic_transaction_count) as domestic_transaction_count,
sum(consumer_transaction_count) as consumer_transaction_count
from rmd_owner.ica_dimension_aggregate
where issuer_id in (41, 42, 43) and bin8 = -1
)
select
cross_border_approved_volume / cross_border_transaction_count as cross_border_ratio,
domestic_approved_volume / domestic_transaction_count as domestic_approved_ratio,
consumer_approved_volume / consumer_transaction_count as consumer_approved_ratio
from cte
The same can be done with subquery:
select
cross_border_approved_volume / cross_border_transaction_count as cross_border_ratio,
domestic_approved_volume / domestic_transaction_count as domestic_approved_ratio,
consumer_approved_volume / consumer_transaction_count as consumer_approved_ratio
from (select
sum(cross_border_approved_volume) as cross_border_approved_volume,
sum(domestic_approved_volume) as domestic_approved_volume,
sum(consumer_approved_volume) as consumer_approved_volume,
sum(cross_border_transaction_count) as cross_border_transaction_count,
sum(domestic_transaction_count) as domestic_transaction_count,
sum(consumer_transaction_count) as consumer_transaction_count
from rmd_owner.ica_dimension_aggregate
where issuer_id in (41, 42, 43) and bin8 = -1
) x
You can also add the group by clause if you need these values calculated for groups, e.g. per issuer_id.