获取两种语言的SQL查询

Question

我的学生表以列为名称和语言。我有以下数据。

我想显示同时了解java和c的学生姓名。我是sql的新手，你能帮我怎么写这个查询吗？

Answer 1

按名称分组，只选择具有两种语言的人

select name
from student
where language in ('java','c')
group by name
having count(distinct language) = 2

Answer 2

SELECT l.name FROM students l
  JOIN students r
  ON l.name = r.name
  WHERE l.language = 'java'
    AND r.language = 'c';