Question

我有以下查询：

select Type,

sum (case when a=1 then 1 end) as A,

sum (case when a=0 then 1 end) as B

这将显示2列A，B及其总计。我需要的是第三列，它将显示每行A和B的总和。类似的东西：

Type       A         B      Total

Apple      5                  5

Orange     3         4        7

Kiwi       2         1        3

Peach                6        6

我尝试过以下操作，但它似乎无法正常工作：

select Type,

sum (case when a=1 then 1 end) as A,

sum (case when a=0 then 1 end) as B,

sum (A+B) as Total

Answer 1

您可以使用以下方式计算Total

select Type,
  sum(case when a=1 then 1 end)        as A,
  sum(case when a=0 then 1 end)        as B,
  sum(case when a IN (0,1) then 1 end) as Total
...

Answer 2

如果您只对0和1值感兴趣，那么这可能更简单：

select Type, sum(a) as A, sum(1 - a) as B, count(*) as Total
from t
where a in (0, 1)
group by Type;

总结一下-Oracle

2 个答案: