Creating summary report from multiple fields from a set of data - mysql

Question

I have a task to write an sql to summarize the following data:
select
payment,
status,
interest,
principal
from payment
payment status interest principal
1 A 100 0
2 r 0 500
3 o 0 400
4 d 0 100
5 A 0 200
6 A 200 0
7 A 300 0
8 A 0 300
a payment relating to interest would be where interest is not 0
a payment relating to principal would be where a principal is not 0
the data would need to be split into type
The result I am looking for is similar to this:
Interest total count principal total count
Status - A 3 1
Other 0 4
total of all payments 3 5
I have been using group function but have not been able to group beyond the interest amount. Any suggestions would be greatly appreciated.

Answer 1

I would suggest to use GROUP BY + WITH ROLLUP for this. Something like:
SELECT
IF(`status` = 'A', 'Status A', 'Others') as `-`,
SUM(`interest` > 0) as `Interest total count`,
SUM(`principal` > 0) as `principal total count`
FROM
(
SELECT 1 as `payment`, 'A' as `status`, 100 as `interest`, 0 as `principal`
UNION ALL
SELECT 2, 'r', 0, 500
UNION ALL
SELECT 3, 'o', 0, 400
UNION ALL
SELECT 4, 'd', 0, 100
UNION ALL
SELECT 5, 'A', 0, 200
UNION ALL
SELECT 6, 'A', 200, 0
UNION ALL
SELECT 7, 'A', 300, 0
UNION ALL
SELECT 8, 'A', 0, 300
) as `sub`
GROUP BY 1 WITH ROLLUP;
Result:
- Interest total count principal total count
Others 0 3
Status A 3 2
3 5
Query:
SELECT
IF(`status` = 'A', 'Status A', 'Others') as `-`,
SUM(`interest` > 0) as `Interest total count`,
SUM(`principal` > 0) as `principal total count`
FROM
`payment`
GROUP BY 1 WITH ROLLUP;