SQL 联合查询 - 两个访问表

Question

我在 MS Access 中有两个相同的查询，qryLabour 和 qryMaterials。我需要从三个字段中得到总数：Labour Mins、Laser Mins 和 $ Cost.

我知道这可以使用联合查询来完成，但是我已经很久没有使用联合查询了，而且我一直在 "Error in FROM Statement"。

我的 SQL 是：

SELECT sum(TotalLabour) as TotalLabour,sum(TotalCost) as TotalCost,sum(TotalLaser) as TotalLaser
FROM

(
SELECT Sum([qryLabour].[Labour Mins]) AS TotalLabour, Sum([qryLabour].[$ Cost]) AS TotalCost, Sum([qryLabour].[Laser Mins]) AS TotalLaser
FROM qryLabour;

union all

SELECT Sum([qryMaterial].[Labour Mins]) AS TotalLabour, Sum([qryMaterial].[$ Cost]) AS TotalCost, Sum([qryMaterial].[Laser Mins]) AS TotalLaser
FROM qryMaterial;

)

有人可以告诉我哪里出错了吗？如果我删除顶级 "Select" 语句，我会得到两行，其中包含总计，这是我添加顶级语句以合并两者的时候。

Answer 1

请注意，但我认为您需要一个别名：

SELECT sum(u.TotalLabour) as TotalLabour,sum(u.TotalCost) as TotalCost,sum(u.TotalLaser) as TotalLaser
FROM

(
SELECT Sum([qryLabour].[Labour Mins]) AS TotalLabour, Sum([qryLabour].[$ Cost]) AS TotalCost, Sum([qryLabour].[Laser Mins]) AS TotalLaser
FROM qryLabour

union all

SELECT Sum([qryMaterial].[Labour Mins]) AS TotalLabour, Sum([qryMaterial].[$ Cost]) AS TotalCost, Sum([qryMaterial].[Laser Mins]) AS TotalLaser
FROM qryMaterial

) as u

编辑：同时删除“;”在子查询中，正如@jarlh 所建议的那样

Answer 2

谢谢 Jaydip。

我实际上只是弄明白了，我在内部 SELECT 语句的末尾有 ;，我删除了它，并使父 SELECT 中的名称唯一。现在工作得很好。

所以正确的代码是：

SELECT sum( tempTotalLabour) as TotalLabour,sum( tempTotalCost) as TotalCost,sum( tempTotalLaser) as TotalLaser
FROM

(
SELECT Sum([qryLabour].[Labour Mins]) AS tempTotalLabour, Sum([qryLabour].[$ Cost]) AS  tempTotalCost, Sum([qryLabour].[Laser Mins]) AS tempTotalLaser
FROM qryLabour

union all

SELECT Sum([qryMaterial].[Labour Mins]) AS  tempTotalLabour, Sum([qryMaterial].[$ Cost]) AS  tempTotalCost, Sum([qryMaterial].[Laser Mins]) AS  tempTotalLaser
FROM qryMaterial

) ;

干杯克里斯

SQL 联合查询 - 两个访问表

SQL Union Query - two access tables

sql

union

ms-access

union-all