在特定时间获取不同的用户计数 MDX QUERY

Question

我需要一些 mdx 帮助。

立方体详情：

Measures.Users -> 对用户的不同计数。

我想找到这个查询的 mdx 等效项：

Select a.shopId ,   Month(TransactionDate) Month_Transaction, 
Year(TransactionDate) Year_Transaction,
count(distinct b.UserID) UniqueUserCount

FROM [dbo].[shop] a
JOIN users b ON a.UserID = b.UserID
where TransactionDate >= '2018-01-01' 
Group by  a.shopId ,Month(TransactionDate), Year(TransactionDate)

这是我迄今为止所拥有的，无论日期如何，它都会产生唯一计数。我想要日期范围内的唯一计数。请让我知道如何实现这一目标？

SELECT { 
[Date].[Month].&[2020]&[2020-Q3]&[2020-09],
[Date].[Month].&[2020]&[2020-Q4]&[2020-10],
[Date].[Month].&[2020]&[2020-Q4]&[2020-11], 
[Date].[Month].&[2020]&[2020-Q4]&[2020-12]
} ON COLUMNS, NON EMPTY 
{ 
    [ShopLocations].[Hierarchy].[Shop] 
} ON ROWS 

FROM [ShopperCube] 
where (Measures.Users)

Answer 1

内置的非重复计数度量提供了最大的灵活性。听起来您已经有一个 Measure.Users 了？用户的度量组是否连接到您的 Date 和 ShopLocations 维度？

为了帮助实现这一点，我将回顾多对多革命论文中的不同计数模式。这种方法提供了一种更灵活且运行速度可能更快的无代码解决方案：

https://sqlbi.com/whitepapers/many2many

Answer 2

您可以使用DistinctCount MDX 函数。

官方文档不是很清楚，但是，一般原则是：您将“Set”传递给此函数以获取不同的值。

一个示例 MDX

WITH SET MySet AS
    { [Dim User].[User Id].Children } 
 
MEMBER Measures.SetDistinctCount AS
    DISTINCTCOUNT(MySet)

SELECT { Measures.SetDistinctCount, Measures.Amount }  ON 0
       , { [Dim Date].[Date Key].AllMembers } ON 1
FROM [Mine]

为了验证这一点，以下是我的设置：

查询结果

另外，给出创建表和处理不同数据的示例 sql：

IF OBJECT_ID('FactTransaction') IS NOT NULL
    DROP TABLE FactTransaction
GO

CREATE TABLE FactTransaction (ShopId INT, TransactionDateKey INT, UserId INT, Amount INT)
GO

IF OBJECT_ID('DimDate') IS NOT NULL
    DROP TABLE DimDate
GO
CREATE TABLE DimDate(DateKey INT, FullDate DATE)
GO

IF OBJECT_ID('DimUser') IS NOT NULL
    DROP TABLE DimUser
GO
CREATE TABLE DimUser(UserId INT, UserName VARCHAR(50))
GO

IF OBJECT_ID('DimShop') IS NOT NULL
    DROP TABLE DimShop
GO
CREATE TABLE DimShop(ShopId INT, ShopName VARCHAR(50))
GO

--Shop 1
INSERT INTO FactTransaction values(1, 20210101, 1, 10)
INSERT INTO FactTransaction values(1, 20210101, 2, 5)
INSERT INTO FactTransaction values(1, 20210101, 3, 20)

INSERT INTO FactTransaction values(1, 20210102, 2, 10)
INSERT INTO FactTransaction values(1, 20210102, 4, 15)

INSERT INTO FactTransaction values(1, 20210103, 3, 5)
INSERT INTO FactTransaction values(1, 20210103, 4, 10)
INSERT INTO FactTransaction values(1, 20210103, 5, 20)
INSERT INTO FactTransaction values(1, 20210103, 1, 20)


--Shop 2
INSERT INTO FactTransaction values(2, 20210103, 2, 10)
INSERT INTO FactTransaction values(2, 20210103, 2, 5)
INSERT INTO FactTransaction values(2, 20210103, 2, 20)
GO

INSERT INTO DimDate VALUES(20210101, '2021-01-01')
INSERT INTO DimDate VALUES(20210102, '2021-01-02')
INSERT INTO DimDate VALUES(20210103, '2021-01-03')
GO

INSERT INTO DimUser VALUES(1, 'First')
INSERT INTO DimUser VALUES(2, 'Second')
INSERT INTO DimUser VALUES(3, 'Third')
INSERT INTO DimUser VALUES(4, 'Fourth')
INSERT INTO DimUser VALUES(5, 'Fifth')

GO

INSERT INTO DimShop VALUES(1, 'Shop 1')
INSERT INTO DimShop VALUES(2, 'Shop 2')
GO