View的SELECT在FROM子句中包含一个子查询 ?mysql

我有两个表，我需要创建一个视图。这些表是：

credit_orders(id, client_id, number_of_credits, payment_status) credit_usage(id, client_id, credits_used, date) 我使用以下查询来执行此操作。不带“创建视图”部分的查询运行良好，但带有“创建视图”的查询则显示错误“视图的SELECT在FROM子句中包含子查询”。可能是什么问题和可能的解决方案：

create view view_credit_status as (select credit_orders.client_id, sum(credit_orders.number_of_credits) as purchased, ifnull(t1.credits_used,0) as used from credit_orders left outer join (select * from (select credit_usage.client_id, sum(credits_used) as credits_used from credit_usage group by credit_usage.client_id) as t0 ) as t1 on t1.client_id = credit_orders.client_id where credit_orders.payment_status='Paid' group by credit_orders.client_id)