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总计：Labour Mins，Laser Mins和$ Cost。

我知道可以使用联合查询来完成此操作，但是已经使用了很长时间，因为我一直使用联合查询，并且不断收到“ FROM语句中的错误”。

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;

)

请有人能告诉我我要去哪里错了吗？如果删除顶层的“选择”语句，我将得到两行包含总计的行，这是我添加顶层语句来合并两者的时候。

Answer 1

请注意，但是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

修改：同时删除“;”在子查询中，如@jarlh建议

Answer 2

感谢Jaydip。

我实际上才知道，在内部;语句的末尾有SELECT，我删除了它，并使父SELECT中的名称唯一。现在工作很好。

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

) ;

欢呼克里斯

SQL联合查询-两个访问表

2 个答案: