Subquery In Postgresql not matching data expected - sql

Question

When the query below is used I get 7 records from the database.
SELECT pickup_date::date,
SUM(CASE WHEN paid ='Yes' THEN price ELSE 0 END) AS TotalMoMoPaid
from requests
where order_status = 'Done'
and payment_mode = 'MoMo'
and pickup_date::date >= current_timestamp::date - INTERVAL '7 days'
GROUP BY pickup_date::date,paid,order_status,price
When the same query is used as a sub query, I get 2 records which is not what I expect,
SELECT pickup_date::date,
sub.TotalMoMoPaid,
SUM(CASE WHEN order_status ='Done' THEN price ELSE 0 END) AS "TotalCashSales"
from (
SELECT paid as subPaid,
order_status as subStatus,
price as subPrice,
SUM(CASE WHEN paid ='Yes' THEN price ELSE 0 END) AS TotalMoMoPaid
from requests
where order_status = 'Done'
and payment_mode = 'MoMo'
and pickup_date::date >= current_timestamp::date - INTERVAL '7 days'
GROUP BY pickup_date::date,subPaid,subStatus,subPrice
) AS sub, requests
where order_status ='Done'
and payment_mode = 'Cash'
and pickup_date::date >= current_timestamp::date - INTERVAL '7 days'
GROUP BY sub.TotalMoMoPaid,subPaid,pickup_date::date
ORDER BY sub.TotalMoMoPaid,pickup_date::date

Answer 1

This query should work instead of using subqueries;
SELECT pickup_date::date,
SUM(CASE WHEN payment_mode = 'MoMo' and paid = 'Yes' THEN price ELSE 0 END) AS TotalMoMoPaid,
SUM(CASE WHEN payment_mode = 'Cash' and paid = 'Yes' THEN price ELSE 0 END) AS TotalCashSales
FROM requests
WHERE order_status = 'Done'
and pickup_date::date >= current_timestamp::date - INTERVAL '7 days'
GROUP BY pickup_date::date,paid,order_status,price