选择与另一个表连接的特定行

Question

我想从java.lang.NumberFormatException: For input string: "863092+01" 表

中获取数据

最简单的方法就是这样

Company

但是，我有另一张表"Select id from Company " Company Table id company 1 comA 2 comB 3 comC 通过company_id与Member Table相关联

Company Table

现在我想选择“拥有两名以上成员的公司”

（在这种情况下Member Table id company_id companymember 1 1 john 2 1 Tam 3 2 haya 4 1 lee 5 3 kih 6 3 wild 和comA有两个成员）

如何通过SQL实现？

Answer 1

您可以使用group by和having

select company, count(*)
from Company a
inner join member b on a._id = b.company_id
group by company
having count(*) > 2

Answer 2

SELECT 
  Company.company, count(*) 
FROM
  Company 
JOIN 
  Member on Company.id = Member.company_id 
GROUP BY 
  Company.company 
HAVING 
  count(*) > 2