Question

我有一个包含以下列的表：

          Cost     Rate

          Repair   12
          Repair   223
          Wear     1000    
          Wear     666
          Fuel     500
          Repair   600
          Fuel     450
          Wear     400

我希望这些数据作为列（修复，磨损，燃料）：

         Repair    Wear   Fuel
           825     2066    950

如何使用MS Access查询执行此操作？

Answer 1

虽然有一个传统的SQL解决方案非常复杂，但是阅读this page提醒我MS Access有一个TRANSFORM ... PIVOT语句，您可能应该查看并使用它来执行此操作。< / p>

我无法确定但它看起来应该是这样的：

TRANSFORM Sum([Items].[Rate]) AS SumOfRate 
SELECT [Items].[Costs] 
FROM Items 
GROUP BY [Items].[Costs] 
PIVOT Format([Items].[Costs]);

它可以变得更加漂亮。 E.G。

PIVOT Format([Items].[month],"mmm") In ("Jan","Feb",...,"Nov","Dec");

Answer 2

未经测试但

SELECT
(SELECT  sum(rate)  from mytable where cost = 'Repair') AS Repair ,
(SELECT  sum(rate) from mytable where cost = 'Wear') AS Wear,
(SELECT  sum(rate) from mytable wherecost = 'Fuel') AS Fuel

Answer 3

您可以使用此查询

select 
sum(select rate from yourtable where cost = 'Repair') "Repair", 
sum(select rate from yourtable where cost = 'Wear') "Wear", 
sum(select rate from yourtable where cost = 'Fuel') "Fuel" 
from dual

如果您使用的是Oracle

否则，如果有任何其他数据库引擎，您可以在此之前快速声明

create table dual (x char)

insert into dual values "x"

Answer 4

您可以使用交叉表查询执行此操作。 “访问查询”窗口中有一个向导，可指导您创建一个向导。只需单击“新建查询”按钮，然后选择“交叉表查询向导”。

Answer 5

这将获得您需要的数据：

select cost, sum(rate)

from mytable

group by cost

然后你可以按照自己喜欢的方式呈现它。

如何将一行中的字段转换为列？

5 个答案: