Question

我在SQL编码方面相当新，我想知道是否有办法可以实现以下语句的尝试结果：

SELECT CASE sc.descrip 
        WHEN 'x' THEN 'option1' AND 'option2'
        ELSE sc.descrip 
    END as description
FROM status_code sc

不幸的是，'AND'不能以case语句的方式工作。

谢谢，

以下是我正在尝试做的一个例子：

Example  | Duration
ShovelA  | 3    
ShovelB  | 5  
ShovelC  | 7  
ShovelD  | 9  



Example     | Duration
A/B Shovels | 8  
All Shovels | 24

Answer 1

Select 'A/B Shovels' as Example,sum(Duration) From status_code 
       Where Right(Example,1) in ('A','B')
union 
Select 'All Shovels' as Example,sum(Duration) From status_code

Answer 2

我能想到这样做的唯一方法是UNION许多SELECT，每个SELECT都有自己的聚合，例如。

SELECT "A/B Shovels" AS Example, Sum(Duration) AS Duration
FROM status_code
WHERE Example in ("ShovelA", "ShovelB")
UNION
SELECT "All Shovels" AS Example, Sum(Duration) AS Duration
FROM status_code

SQL：在单独的标头下复制数据

2 个答案: