dax - DAX - 虚拟表中的参考列
问题描述
如何引用存储在 DAX 变量中的表的列?包括我下面的代码 - 谢谢!
measure =
VAR min_dates =
//get the min order date for each customer
SUMMARIZECOLUMNS(Orders[Customer ID],"min_date",MIN(Orders[Order Date]))
RETURN
min_dates
// what I want to do here is take the table I created above (min_dates) and do the following:
// 1) group_by min_date
// 2) count(distinct) Customer ID
// What I'm struggling with is how to reference the columns created in the min_dates table above.
解决方案
假设您的数据如下所示:
Orders
+------------+---------+------------+
| CustomerID | OrderID | Order Date |
+------------+---------+------------+
| 1 | 1 | 25/07/2020 |
+------------+---------+------------+
| 2 | 2 | 26/07/2020 |
+------------+---------+------------+
| 3 | 3 | 27/07/2020 |
+------------+---------+------------+
| 4 | 4 | 28/07/2020 |
+------------+---------+------------+
| 4 | 5 | 29/07/2020 |
+------------+---------+------------+
| 5 | 6 | 30/07/2020 |
+------------+---------+------------+
| 6 | 7 | 31/07/2020 |
+------------+---------+------------+
| 6 | 8 | 01/08/2020 |
+------------+---------+------------+
| 7 | 9 | 01/08/2020 |
+------------+---------+------------+
| 7 | 10 | 03/08/2020 |
+------------+---------+------------+
| 8 | 11 | 03/08/2020 |
+------------+---------+------------+
| 9 | 12 | 04/08/2020 |
+------------+---------+------------+
| 10 | 13 | 05/08/2020 |
+------------+---------+------------+
| 11 | 14 | 05/08/2020 |
+------------+---------+------------+
| 11 | 15 | 06/08/2020 |
+------------+---------+------------+
| 12 | 16 | 06/08/2020 |
+------------+---------+------------+
| 12 | 17 | 06/08/2020 |
+------------+---------+------------+
我假设你想计算新客户。我创建了一个解决问题的措施,使用RANKX
. 根据 CustomerID 和 Order Date 这对值,计算采用每个 CustomerID 的第一个日期。换句话说,使用 SQL 命名法,RANKX
是按 CUSTOMERID 和 OrderBy Order Date 进行分区。该度量将动态创建一个表,添加一个列来对每个 CustomerID 和 Order Date 对进行排名。排名将计算每个客户的订单数量。DISTINCTCOUNT
当在表上创建的排名等于 1 时,第二步使用CustomerID。
UniqueCustomers =
VAR t1 =
ADDCOLUMNS (
orders,
"Rank", RANKX (
FILTER ( ALL ( Orders ), [CustomerID] = EARLIER ( Orders[CustomerID] ) ),
[Order Date],
,
ASC,
DENSE
)
)
RETURN
CALCULATE ( DISTINCTCOUNT ( Orders[CustomerID] ), FILTER ( t1, [Rank] = 1 ) )
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