mysql - SQL 按组计数

Question

我有一个看起来像这样的表

id  name answer   question
1   john  correct 1
1   john  correct 2
1   john  correct 3
1   john  wrong   4
2   lee   wrong   1
2   lee   correct 2
2   lee   correct 3
3   ana   correct 1
3   ana   wrong   2

我希望能够获得所有唯一用户的列表，并查看他们答对了多少问题，错了多少问题。

我试过这样的东西，但我似乎无法让它工作:

SELECT id, user_id, name, question_id, (select count(answer) from table where answer = 'CORRECT') as correct, (select count(answer) from table where answer= 'WRONG') as wrong FROM table GROUP BY user_id

有人可以帮助我走上正轨吗？谢谢

Answer 1

试试这个:

SELECT name, answer, COUNT(*) FROM yourtablenamehere GROUP BY name, answer