計數多個數據查詢的單個列

Question

我有一個列名狀態（INT），其中只有0和1被插入取決於邏輯，我要計數的查詢，其可以指望1多少0和有多少在有在單個查詢中如表：

SELECT COUNT（狀態）從產品詳情......

Answer 1

select 
    sum(state) countOfOnes, 
    sum(decode(state, 0, 1, 0)) countOfZeros 
from 
    productDetail 
; 

或

select 
    sum(state) countOfOnes, 
    count(*) - sum(state) countOfZeros 
from 
    productDetail 
; 

或

select 
    state, 
    count(*) over (partition by state order by state) countOfState 
from 
    productDetail 
; 

前兩個例子將返回一行具有兩列：

countOfOnes countOfZeros 
========================= 
154   21 

第三個例子將返回具有兩列，每個狀態一個行兩行。

state  countOfState 
========================= 
0   21 
1   154 

Answer 2

另一個變化：

select 
    count(*) countOverall, 
    sum(state) countOfOnes, 
    count(*) - sum(state) countOfZeroes 
from 
    productDetail; 

Answer 3

select count(state) from productDetail Where state = 0 
select count(state) from productDetail Where state = 1