Question

Hi I have an order table and a payment table which are linked by order_num. I would like to get entries from order table who have entries in the payment table of PaymentType ‘A’ as well as PaymentType ‘B’ and their amounts match. Example order number 411 should only be returned to me if it has at least two payments and one of them is paymenttype ‘A’ and the other one is paymenttype ‘b’ and amount for both is 45

Thanks.

Answer 1

Like the comments state, there is very little info to go off of for a truly definitive answer. Here goes a possible solution, at least in a basic form.

SELECT *
FROM Orders o
LEFT JOIN Payment p1 ON o.order_num = p1.order_num
LEFT JOIN Payment p2 ON o.order_num = p2.order_num
WHERE p1.Type = "A"
AND p2.Type = "B"
AND p1.Amount = p2.Amount