Question

How do I find the sum of an average? For example:

select avg(app_loan_amnt) 
from receipt_history
union 
select sum(avg(app_ln_amnt)) 

I know the last union statement is incorrect, but how would I do that?

Answer 1

If I understand correctly, you want to:

1. get the average of some value, when grouping the data a certain way
2. sum those averages

You can accomplish this with a subquery:

select
  sum(group_avg) as total
from (
  select avg(<some_value>) as group_avg
  from receipt_history
  group by <column>
) q;

You’ll need to fill in what you’re averaging and how you’re grouping the data.