如何在group by的结果中保留重复项

Question

我已编写此查询以获取每个程序集的最大席位数的记录，但此查询将从结果中删除重复项：

查询：

select * from (select assembly, party_id, count(party_id) as seats from winner
group by assembly, party_id) as subTable group by assembly having max(seats) order by assembly asc;

输出：

但我希望输出如下：

请告诉我该怎么办？

Answer 1

我不知道having子句的用途。它只是检查最大值是否不等于0.

您需要按party_id进行分组。我想这就是你想要的：

select assembly, party_id, count(party_id) as seats
from winner
group by assembly, party_id
order by assembly asc;

Answer 2

如果您想保留重复的程序集，请不要使用GROUP BY assembly,，其功能是删除重复项。

奇怪的问题。