如何計算具有相同值的答案？

Question

我有這樣一個表：

--Table Answer-- 
Id  Question_id Attendee_id Answer 
100 qst1   001   Name1 
101 qst2   001   Name1 
102 qst3   002   Name2 

我想知道我怎麼能算具有相同價值觀的答案？

Answer 1

一個standard SQL aggregate

SELECT Answer, COUNT(*) FROM MyTable GROUP BY Answer 

Answer 2

對於每一個問題嗎？

SELECT 
    Question_id, 
    Answer, 
    COUNT(1) qty 
GROUP BY 
    Question_id, Answer 

從SELECT和GROUP BY排除Question_id如果你想總計數，而不是問題的分區，但我認爲數字將用處不大。

Answer 3

Select Answer, Count(*) FROM answer GROUP BY Answer 

Answer 4

SELECT answer,COUNT(*) FROM table 
GROUP BY answer