MYSQL子查询还是左连接？

Question

我正在制作一个小发票应用程序而且我一直在查询以获取我的发票的总开放金额。

一点解释：

我在数据库中有2个表invoices和payments，这些表与列invoice_id相关。一张发票可能有多笔付款。

我想得的是所有发票的总开仓金额。

这是我尝试的但它不起作用。

total_paid金额不正确，它是最后一张发票的总和，而不是所有发票的总和。

SELECT
  COUNT( * ) AS count,
  SUM( invoice_amount_total ) AS total,
  (SELECT
     SUM( amount ) AS total
   FROM `invoice_payments`
   WHERE `invoice_id` = s.id) AS total_paid
FROM sales_invoices AS s
WHERE s.administration_id = 3
    AND (`invoice_amount_total` <> (SELECT
                      SUM( `amount` ) AS sum
                    FROM `invoice_payments`
                    WHERE `invoice_id` = s.id)
      OR (SELECT
        SUM( amount ) AS sum
          FROM `invoice_payments`
          WHERE `invoice_id` = s.id)IS NULL)

有什么想法吗？