Oracle sql查询谁说两种语言和所有国家和剩余列的总和

Question

我有一个数据库查询select * from student;

学生表中有以下数据。

language     countries      know    dontknow    members
--------      -------        ----    -------    --------
english          USA        50000   20000       500000
french         FRANCE       80000   30000       800000
jerman        German        30000   40000       900000
italian        Italy        20000   50000       700000
english          USA        50000   20000       500000
french         FRANCE       80000   30000       800000
jerman        German        30000   40000       900000
italian        Italy        20000   50000       700000

请提供sql查询，了解谁说两种语言和所有国家/地区以及其余列的总和。

Answer 1

select country,
       sum(know) as know,
       sum(dontknow) as dontknow,
       sum(members) as members
from student
group by country