php MySQL 多对多条件 Group By

Question

我正在多个多对多关系表之间创建一个查询，以便将它们的值链接在一起。我的问题是，我似乎无法找到一种方法来按此查询中“服务”子表中的“服务”值进行分组：

SELECT 
    GROUP_CONCAT(containers.container_id ORDER BY containers.container_id DESC) AS container_id, 
    GROUP_CONCAT(containers.container_serial ORDER BY containers.container_id DESC) AS container_serial, 
    GROUP_CONCAT(containers.container_index ORDER BY containers.container_id DESC) AS container_index, 
    invoices.*, 
    statuses.status, 
    clients.client, 
    GROUP_CONCAT(services.service_id ORDER BY containers.container_id DESC) AS service_id, 
    GROUP_CONCAT(services.service ORDER BY containers.container_id DESC) AS service 
FROM containers_invoices 
LEFT JOIN containers 
    ON containers_invoices.container_id = containers.container_id 
LEFT JOIN invoices 
    ON containers_invoices.invoice_id = invoices.invoice_id 
LEFT JOIN statuses 
    ON invoices.status_id = statuses.status_id 
LEFT JOIN clients 
    ON invoices.client_id = clients.client_id 
LEFT JOIN invoices_services 
    ON invoices.invoice_id = invoices_services.invoice_id 
LEFT JOIN services 
    ON invoices_services.service_id = services.service_id 
GROUP BY containers_invoices.invoice_id 
ORDER BY invoice_id DESC 

现在我的结果看起来像这样：

C09-65475u76u76, C08-dfsgreg345g3 - 114 - ? - 服务，服务 - 1000 - 已发送

该服务应该只显示一次，并且不会像我拥有的​​容器编号那样循环多次。我知道我很接近，但我似乎无法缩小解决方案的差距。感谢您的帮助！

Answer 1

您正在按发票分组：

GROUP BY containers_invoices.invoice_id 

你应该根据我的理解按服务分组

GROUP BY services.service_id