SQL嵌套聚合

Question

我正在使用SQL語言。

我有一個名爲parta的表。我想要計算字段40b1和40b2並找出這個總和。我的查詢在這裏。

 select 
     count(40b1) as 40b1, 
     count(40b2) as 40b2, 
     sum(count(40b1) + count(40b2)) as sum, 
     code/100 as code 
     from  parta 
     where 40b1=true and mandays>=1000 
     group by code/100 ; 

預期輸出

 40b1  40b2 sum code verticalsum 
     5  5  10 20 7 
     2  2  4  21 7 

如何完成它？請幫忙。

要獲取此verticalsum列，可以使用哪種查詢？

Answer 1

你不需要SUM()的COUNT()的。只需將它們加在一起。

select count(40b1) as 40b1, 
     count(40b2) as 40b2, 
     count(40b1) + count(40b2) as sum, 
     code/100 as code 
from  parta 
where 40b1=true and mandays>=1000 
group by code/100 ;