Table.AggregateTableColumn

将多个表的一列聚合到包含表中的多列。

Syntax

Table.AggregateTableColumn(
    table as table,
    column as text,
    aggregations as list
) as table

Remarks

将 table[column] 中的表聚合到包含这些表的聚合值的多个列。aggregations 用于指定包含要聚合的表的列、要应用于表以生成其值的聚合函数以及要创建的聚合列的名称。

Examples

Example #1

将表 {[t = {[a=1, b=2, c=3], [a=2,b=4,c=6]}, b = 2]} 中的 [t] 的表列聚合为 [t.a]、[t.b] 的最小值和最大值以及 [t.a] 中值计数的总和。

Table.AggregateTableColumn(
    Table.FromRecords(
        {
            [
                t = Table.FromRecords({
                    [a = 1, b = 2, c = 3],
                    [a = 2, b = 4, c = 6]
                }),
                b = 2
            ]
        },
        type table [t = table [a = number, b = number, c = number], b = number]
    ),
    "t",
    {
        {"a", List.Sum, "sum of t.a"},
        {"b", List.Min, "min of t.b"},
        {"b", List.Max, "max of t.b"},
        {"a", List.Count, "count of t.a"}
    }
)

Result:

Table.FromRecords({[#"sum of t.a" = 3, #"min of t.b" = 2, #"max of t.b" = 4, #"count of t.a" = 2, b = 2]})

Category

Table.Transformation