MySQL getting sum of tables with the same id - mysql

Question

I have four tables person,loan,ca,payments
I would like to get the sum of all payments amounts and cash advance amounts which has the same ID as the loan joined with a person from a specific date.
Here is my code, but the sum is calculated incorrectly:
SELECT pd.*,
l.total_loan_amount,
sum(c.ca_total_amount) AS ctot,
sum(p.payment_amount)
FROM personal_data pd
LEFT JOIN loans l
ON pd.id_personal_data = l.id_personal_data
LEFT JOIN ca c
ON l.id_loan = c.id_loan
LEFT JOIN payments p
ON l.id_loan = p.id_loan
WHERE l.loan_date = curDate()
AND (
c.ca_date = curDate()
OR c.ca_date IS NULL
)
AND (
p.payment_date = curDate()
OR p.payment_date IS NULL
)
GROUP BY pd.id_personal_data

Answer 1

Doing that may sometimes retrieve invalid results because id may or may not sometimes be present on other table.
Try using a subquery for each column you want to retrieve.
SELECT pd.*,
l.total_loan_amount,
c.totalCA,
p.totalPayment
FROM personal_data pd
LEFT JOIN loans l
ON pd.id_personal_data = l.id_personal_data
LEFT JOIN
(
SELECT id_loan, SUM(ca_total_amount) totalCA
FROM ca
-- WHERE DATE(ca_date) = DATE(CURDATE()) OR
-- ca_date IS NULL
GROUP BY id_loan
) c ON l.id_loan = c.id_loan
LEFT JOIN
(
SELECT id_loan, SUM(payment_amount) totalPayment
FROM payments
-- WHERE DATE(payment_date) = DATE(CURDATE()) OR
-- payment_date IS NULL
GROUP BY id_loan
) p ON l.id_loan = p.id_loan
WHERE DATE(l.loan_date) = DATE(curDate())
I think dates on every payment and cash advance are irrelevant because you are looking for its totals based on the date of loan