Question

所以我正在解决MS Access中的一个问题，我需要一些按特定值分组的聚合值。

ExTable1：

  Type    TotalHours
+-------+------------+
|  A          10     |
|  A          20     |
|  A          30     |       
|  B          10     |
|  C          10     |
|  D          10     |
|  E          10     |
|  F          10     |
+-------+------------+

我有这个问题：

SELECT Type, SUM(TotalHours)
FROM ExTable1
GROUP BY Type

它将所有的A，B，C等组合在一起，但我也想在同一个查询中将E和F的值组合在一起。我该怎么做？

Answer 1

考虑使用Union Query：

SELECT Type, Sum(TotalHours) As TotalHours
FROM ExTable1
WHERE Type IN ('A', 'B', 'C', 'D')
GROUP BY Type;

UNION SELECT 'E & F', Sum(TotalHours)
FROM ExTable1
WHERE Type IN ('E', 'F');

Answer 2

使用Conditional Aggregate

SELECT Type, 
       SUM(TotalHours),
       SUM(case when Type in ('E','F') then TotalHours else 0 END) as 'E&F total'
FROM ExTable1
GROUP BY Type

MS Access组特定值一起使用

2 个答案: