通过给出错误将三个表与组连接答案

【问题标题】：Join three tables with group by giving error通过给出错误将三个表与组连接
【发布时间】：2018-08-06 17:53:09
【问题描述】：

数据库中有users、organization_entries和user_invoices三个表，我正在尝试加入这三个表，我的查询有点像这样

select users.id , sum(user_invoices.due_amount) , organization_entries.id, organization_entries.createdAt from users INNER JOIN user_invoices ON users.id = user_invoices.customer_id INNER JOIN on users.id = organization_entries.user_id GROUP BY users.id ORDER BY organization_entries.createdAt;

但一次又一次，我得到这个错误 -

ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'on users.id = organization_entries.user_id GROUP BY users.id ORDER BY organiza' at line 1

我无法理解我做错了什么。

【问题讨论】：

INNER JOIN on users.id = organization_entries.user_id 处缺少表名
是的，愚蠢的错误，非常感谢

标签： mysql database join group-by sql-order-by

【解决方案1】：

如下更新查询，第二个内连接中缺少表

select users.id , sum(user_invoices.due_amount) , organization_entries.id, 
organization_entries.createdAt 
from users INNER JOIN user_invoices ON users.id = user_invoices.customer_id 
INNER JOIN organization_entries ON users.id = organization_entries.user_id 
GROUP BY users.id ORDER BY organization_entries.createdAt ;

【讨论】：