单组功能 - 按类别和地区划分的产品数量

Question

我在线查看并找不到以下问题的答案。

我想创建下表。我可以创建除Count_product_A和count_product_B之外的所有列。

链接表：

链接表1：

Select 
    Region_flag, type, count(total product) 
    ,sum(Case when product in ('A') then count(total product) END) as count_product_A 
    ,sum(Case when product in ('B') then count(total product) END) as count_product_B 
FROM Table1 
Group by 
    Region_flag, type 

Answer 1

尝试此查询：

SELECT 
    region_flag, type, 
    count(1) AS count_total, 
    sum(CASE WHEN product IN ('A') THEN 1 ELSE 0 END) AS count_product_A, 
    sum(CASE WHEN product IN ('B') THEN 1 ELSE 0 END) AS count_product_B 
FROM 
    table1 
GROUP BY 
    region_flag, type