sql - SQL Multiple WHERE 分配一个新的表列

Question

由于缺乏语言经验，我遇到了一些问题，希望您的帮助...

我希望代码返回表格，如下例所示：

T01 --  T02 -- T03
23,00  32,00  43,00

所以，这是我的代码：

SELECT
SUM([TOTAL $]) AS T01
FROM PFIN_base
WHERE [COORD] = 'alfa'
UNION
SELECT
SUM([TOTAL $]) AS T02
FROM PFIN_base
WHERE [COORD] = 'beta'
UNION
SELECT 
SUM([TOTAL $]) AS T03
FROM PFIN_base
WHERE [COORD] = 'gama'

此代码返回以下结果：

T01
23,00
32,00
43,00

我怎样才能得到想要的结果？谢谢！

Answer 1

你想要条件聚合：

select sum(case when coord = 'alfa' then [TOTAL $] end) as T01,
       sum(case when coord = 'beta' then [TOTAL $] end) as T02,
       sum(case when coord = 'gamma' then [TOTAL $] end) as T03
from PFin_base