ทิ้งร่วมและที่ไหนที่เงื่อนไขว่า exmaple

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ภาษา sql ทิ้งร่วมกับอยู่ไหนเงื่อนไขว่า

SELECT Customers.customer_id, Customers.first_name, Orders.amount
FROM Customers
LEFT JOIN Orders
ON Customers.customer_id = Orders.customer
WHERE Orders.amount >= 500;

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