画面。如何访问计算字段中其他记录的字段值？

Question

在 Tableau 中，我需要创建新的计算字段。
该字段应该是其他记录字段的总和（见屏幕截图）。

我正在尝试执行以下操作：

IF [Town1] = "Mullingar.Co..." AND [Trip Type1] = "Holiday Trips"

THEN
    IF [Town1] = "Mullingar.Co..."
       AND [Trip Type1] = "Holiday Trips"
       AND [Region1] = 2
    THEN [Trip Count1] END
    +
    IF [Town1] = "Mullingar.Co..."
       AND [Trip Type1] = "Holiday Trips"
       AND [Region1] = 3
    THEN [Trip Count1] END
    +
    IF [Town1] = "Mullingar.Co..."
       AND [Trip Type1] = "Holiday Trips"
       AND [Region1] = 4
    THEN [Trip Count1] END
END

但它 returns 总是 NULL。

Answer 1

您可能想尝试使用 FIXED 的 LOD 表达式。在行的东西 {FIXED [Town1]:SUM([Trip Count1])}

画面。如何访问计算字段中其他记录的字段值？

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