获取属于具有两行以上的父类别的行

Question

我有一些公司和成员的组合

Member Table
id  company_id companymember
1   1          john
2   1          Tam
3   2          haya
4   1          lee
5   3          kih
6   3          wild
7   3          cream 
8   3          earth

我想要的是

the 3 member names which belonging to the company which has more than two members

我想要的是这样的

• company_id 2只有1个成员，第3行未被选中

• company_id 3有4个成员，因此未选择第8行

我的目标

1   1          john
2   1          Tam
4   1          lee
5   3          kih
6   3          wild
7   3          cream 

我可以做到，先拿起company_ids然后 通过脚本和fetch循环每个id。

但是这样，它执行sql多次。

有没有什么好办法在MySql上用一句话SQL ??

执行此操作

Answer 1

试试这个

select id,company_id,companyMember 
from (Select id
            ,company_id
            ,companyMember
            ,Row_Number() OVER(PARTITION BY company_id ORDER By company_id) AS TotalCount 
      from MemberTable
     ) as Table1
where TotalCount <=3 and Company_id in(
                                      Select Company_id
                                      from MemberTable
                                      group by Company_id
                                      having COUNT(Company_id) >=3
                                      )
order by id