Mysql 如果所有分组行均为1，则显示1，否则显示0

我有一个疑问：

select *, sum(services.amount) as service_amount from invoices
left join projects using(project_id)
left join services using(invoice_id)
where client_id = ?
group by project_id
order by issue_date desc

在表

invoices

中，我有一列

paid

，它是

tinyint

，即

1

或

0

---

再加上我的查询，如果所有分组的

paid

列行都相等

1

，我如何才能使返回的

paid

列显示

1

，否则

paid

列显示

0

？

我认为您可以使用sql中的min关键字。比如：

select MIN(paid), sum(services.amount) as service_amount from invoices
left join projects using(project_id)
left join services using(invoice_id)
where client_id = ?
group by project_id
order by issue_date desc

---

我认为您可以在sql中使用min关键字。比如：

select MIN(paid), sum(services.amount) as service_amount from invoices
left join projects using(project_id)
left join services using(invoice_id)
where client_id = ?
group by project_id
order by issue_date desc

选择min（付费）可能吗？如果有0，则应为0，否则为1。

选择最小值（付费）可能吗？如果存在0，则应为0，否则为1