SQL查詢只返回第一個客戶的結果

Question

我的sql查詢只返回屬於數據庫中第一個客戶的訂單的結果。我哪裏錯了？

SELECT orders.id, 
     orders.created_at, 
     orders.customer_id, 
     customers.firstname, 
     customers.surname, 
     customers.email, 
     customers.telephone, 
     customer_addresses.address_1, 
     customer_addresses.address_2, 
     customer_addresses.address_2, 
     customer_addresses.city, 
     customer_addresses.county, 
     customer_addresses.post_code 
FROM orders 
INNER JOIN customers ON orders.customer_id = customers.id 
INNER JOIN customer_addresses ON customers.id = customer_addresses.id 
ORDER BY orders.id 
LIMIT 0, 10; 

Answer 1

，如果你在你的答覆中提到，以@ ceyquem的回答所有的客戶都ADDRESS_ID，我認爲你的加入customer_address表錯誤的列。它應該是

SELECT orders.id, 
     orders.created_at, 
     orders.customer_id, 
     customers.firstname, 
     customers.surname, 
     customers.email, 
     customers.telephone, 
     customer_addresses.address_1, 
     customer_addresses.address_2, 
     customer_addresses.address_2, 
     customer_addresses.city, 
     customer_addresses.county, 
     customer_addresses.post_code 
FROM orders 
INNER JOIN customers ON orders.customer_id = customers.id 
INNER JOIN customer_addresses ON customers.address_id = customer_addresses.id 
ORDER BY orders.id 
LIMIT 0, 10; 

希望工程

Answer 2

如果所有的客戶沒有一個定義的地址，它可能是這個原因，請嘗試更改JOIN操作符如下測試。此外，在年底取消該限制條件，以確保您可以看到所有的結果：

SELECT orders.id, 
     orders.created_at, 
     orders.customer_id, 
     customers.firstname, 
     customers.surname, 
     customers.email, 
     customers.telephone, 
     customer_addresses.address_1, 
     customer_addresses.address_2, 
     customer_addresses.address_2, 
     customer_addresses.city, 
     customer_addresses.county, 
     customer_addresses.post_code 
FROM orders 
LEFT JOIN customers ON orders.customer_id = customers.id 
LEFT JOIN customer_addresses ON customers.id = customer_addresses.id 
ORDER BY orders.id;