Question

这是我目前的数据模型 - ＆gt; part of data model

我需要帮助来创建一个衡量标准。

我想要创建的措施应该显示在一个时间间隔内出行的船舶的总容量，并且能够根据房间类型查看总容量。

我有兴趣获得相当于DAX的DAX：

SELECT SUM(sc.capacity)
FROM Reporting.Trips t
    JOIN Reporting.Dates d ON d.DateId = t.DateId
    JOIN Reporting.ShipCapacities sc on sc.ShipId = t.ShipId
WHERE d.FiscalYear= 2017 AND d.FiscalWeek=15

每种类型的OR

SELECT SUM(sc.capacity)
FROM Reporting.Trips t
    JOIN Reporting.Dates d ON d.DateId = t.DateId
    JOIN Reporting.ShipCapacities sc on sc.ShipId = t.ShipId
WHERE d.FiscalYear= 2017 AND d.FiscalWeek=15 and sc.CabinTypeId = 11

我试图以这种方式定义一个度量：

Total Rooms:=CALCULATE ( SUM ( 'Ship Capacities'[Ship Capacity] ) )

我已经看到它输出的T-SQL相当于：

SELECT SUM(Capacity)
FROM 
(
SELECT DISTINCT sc.*
FROM Reporting.Trips t
    JOIN Reporting.Dates d ON d.DateId = t.DateId
    JOIN Reporting.ShipCapacities sc on sc.ShipId = t.ShipId
WHERE d.FiscalYear= 2017 AND d.FiscalWeek=15
) x

每种类型的OR

SELECT SUM(Capacity)
FROM 
(
SELECT DISTINCT sc.*
FROM Reporting.Trips t
    JOIN Reporting.Dates d ON d.DateId = t.DateId
    JOIN Reporting.ShipCapacities sc on sc.ShipId = t.ShipId
WHERE d.FiscalYear= 2017 AND d.FiscalWeek=15 and sc.CabinTypeId = 11
) x

这些是查询结果 - ＆gt; Query results

感谢。

Answer 1

这是对我有用的最终措施：

Total Rooms:=CALCULATE (
    SUMX (
        'Ship Capacities',
        'Ship Capacities'[Ship Capacity]
            * COUNTROWS ( FILTER ( Trips, AND( Trips[Sailed] = TRUE (),Trips[ShipId] = 'Ship Capacities'[ShipId] ) ))
    )
)

注意COUNTROWS。在多对一的情况下，然后是一对多的关系，它没有迭代（但之前我使用的是SUM而不是SUMX）。我发现不得不提到多对多表之间的关系。否则它不起作用。

当前上下文之外的DAX SUM

1 个答案: