SQL查询只返回第一个客户的结果

Question

我的sql查询只返回属于数据库中第一个客户的订单的结果。我哪里错了？

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

，如果你在你的答复中提到，以@ ceyquem的回答所有的客户都ADDRESS_ID，我认为你的加入customer_address表错误的列。它应该是

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

如果所有的客户没有一个定义的地址，它可能是这个原因，请尝试更改JOIN操作符如下测试。此外，在年底取消该限制条件，以确保您可以看到所有的结果：

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;