Sum of Max in PivotTable for Excel

问题

I have a PivotTable that comes from the following table:

    +---------+---+-----+
    |    A    | B |  C  |
  +-+---------+---+-----+
  |1|   Date  |Id |Value|
  +-+---------+---+-----+
  |2|4/01/2013|1  |4    |
  +-+---------+---+-----+
  |3|4/01/2013|2  |5    |
  +-+---------+---+-----+
  |4|4/01/2013|1  |20   |
  +-+---------+---+-----+
  |5|4/02/2013|2  |20   |
  +-+---------+---+-----+
  |6|4/02/2013|1  |15   |
  +-+---------+---+-----+

And I want to aggregate first by Id and then by Date, using Max to aggregate by Id and then Sum to aggregate by Date. The resulting table would look like this:

    +---------+----------------+
    |    A    | B              |
  +-+---------+----------------+
  |1|   Date  |Sum(Max(Id,Date)|
  +-+---------+----------------+
  |2|4/01/2013|25              |
  +-+---------+----------------+
  |3|4/02/2013|35              |
  +-+---------+----------------+

The 25 above comes from getting the Max per Id per Date (Max(1, 4/01/2013) -> 20 and Max(2, 4/01/2013) -> 5, so the Sum of those Max is 25.

I can do the two levels of aggregation easily by adding the Date and Id columns into the Rows section of the PivotTable, but when choosing an aggregation function for Value, I can either choose Max, getting a Max of Max, or Sum, getting a Sum of Sum. That is, I cannot get a Sum of Max.

Do you know how to achieve this? Ideally, the solution would not be to compute a PivotTable and then copy from there or get a formula, because that would break easily if I want to dynamically change fields.

Thanks!

回答1:

This is how I would do it in SQL:

SELECT DATE, SUM(MAXED_VAL) as SummedMaxedVal
FROM (
     SELECT DATE, ID, MAX(VALUE) as MAXED_VAL
     FROM table
     GROUP BY DATE, ID
)
GROUP BY DATE

来源：https://stackoverflow.com/questions/21563086/sum-of-max-in-pivottable-for-excel

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excel

aggregation