Question

我有一个包含四个表的数据库：表1,2,3和＆amp; 4.每个表包含以下字段：ID（自动编号），日期（日期/时间），名称（文本）和项目（文本）

我创建了一个SQL查询，它使用Union All和Sum Iif表达式来检索＆＃34; Apples＆＃34;，＆＃34; Oranges＆＃34;和＆＃34; Pears＆＃34;发生在每个人的“项目”列下。例如，当Query运行时，我希望查询向我提供日期，个人姓名以及＆＃34; Apples＆＃34;，＆＃34; Oranges＆＃34;和/或的总计＆＃34;梨＆＃34;为日期和个人。 （2015年12月15日 - Dee Wolf - 15个苹果，10个橘子，20个梨）

问题：我的查询成功计算了所有4个表中的所有数据，但是它没有产生总数。相反，它为每张桌子提供一对一的计数。例如：表1将显示John有1个苹果和1个橙色，其中表2显示John有2个苹果和1个橙色。当我运行我的查询时，它会显示约翰有2个苹果，1个苹果，1个橙色和1个橙色（每个表的结果），但我想要它只是说约翰总共有3个苹果。

我已将此代码写入另一个数据库，它似乎产生了我想要的结果。但我不确定为什么我无法重现结果。我忽略了什么吗？

这是SQL：

SELECT Table1.Date, Table1.Name, Sum(IIf([Table1]![Item]="Apples",1,Null)) AS CountApples, Sum(IIf([Table1]![Item]="Oranges",1,Null)) AS CountOranges, Sum(IIf([Table1]![Item]="Pears",1,Null)) AS CountPears
FROM Table1
GROUP BY Table1.Date, Table1.Name
HAVING (((Table1.Date) Between [SS/SS/SS] And [EE/EE/EE]) AND ((Table1.Name)))
UNION ALL
SELECT Table2.Date, Table2.Name, Sum(IIf([Table2]![Item]="Apples",1,Null)) AS CountApples, Sum(IIf([Table2]![Item]="Oranges",1,Null)) AS CountOranges, Sum(IIf([Table2]![Item]="Pears",1,Null)) AS CountPears
FROM Table2
GROUP BY Table2.Date, Table2.Name
HAVING (((Table2.Date) Between [SS/SS/SS] And [EE/EE/EE]) AND ((Table2.Name)))
UNION ALL
SELECT Table3.Date, Table3.Name, Sum(IIf([Table3]![Item]="Apples",1,Null)) AS CountApples, Sum(IIf([Table3]![Item]="Oranges",1,Null)) AS CountOranges, Sum(IIf([Table3]![Item]="Pears",1,Null)) AS CountPears
FROM Table3
GROUP BY Table3.Date, Table3.Name
HAVING (((Table3.Date) Between [SS/SS/SS] And [EE/EE/EE]) AND ((Table3.Name)))
UNION ALL
SELECT Table4.Date, Table4.Name, Sum(IIf([Table4]![Item]="Apples",1,Null)) AS CountApples, Sum(IIf([Table4]![Item]="Oranges",1,Null)) AS CountOranges, Sum(IIf([Table4]![Item]="Pears",1,Null)) AS CountPears
FROM Table4
GROUP BY Table4.Date, Table4.Name
HAVING (((Table4.Date) Between [SS/SS/SS] And [EE/EE/EE]) AND ((Table4.Name)));

Answer 1

HAVING ((...) AND ((Table1.Name)))

仍然没有多大意义......

要获取总计，请将整个查询包装到Sum（）/ GROUP BY查询中：

SELECT [Date], [Name], Sum(CountApples) AS TotalApples, Sum(CountOranges) AS TotalOranges, 
                       Sum(CountPears) AS TotalPears
FROM (
    -- your UNION query goes here
)
GROUP BY [Date], [Name]

（无耻地从https://stackoverflow.com/a/32274957/3820271解除）

Access 2010 - 使用Union All和Sum Iif查询以生成多个表中特定事件的总计数/总和

1 个答案: