相关疑难解决方法(0)

我想运行此查询:

SELECT DISTINCT ON (address_id) purchases.address_id, purchases.*
FROM purchases
WHERE purchases.product_id = 1
ORDER BY purchases.purchased_at DESC

但我得到这个错误:

PG ::错误:错误:SELECT DISTINCT ON表达式必须与初始ORDER BY表达式匹配

添加address_id为第一个ORDER BY表达式会使错误无效,但我真的不想添加排序address_id.是否可以不通过订购address_id？