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Table.ExpandTableColumn

Expands a column of records or a column of tables into multiple columns in the containing table.

Syntax​

Table.ExpandTableColumn(
    table as table,
    column as text,
    columnNames as list,
    optional newColumnNames as list
) as table

Remarks​

Expands tables in table[column] into multiple rows and columns. columnNames is used to select the columns to expand from the inner table. Specify newColumnNames to avoid conflicts between existing columns and new columns.

Examples​

Example #1​

Expand table columns in [a] in the table ({[t = {[a=1, b=2, c=3], [a=2,b=4,c=6]}, b = 2]}) into 3 columns [t.a], [t.b] and [t.c].

Table.ExpandTableColumn(
    Table.FromRecords({
        [
            t = Table.FromRecords({
                [a = 1, b = 2, c = 3],
                [a = 2, b = 4, c = 6]
            }),
            b = 2
        ]
    }),
    "t",
    {"a", "b", "c"},
    {"t.a", "t.b", "t.c"}
)

Result:

Table.FromRecords({
    [t.a = 1, t.b = 2, t.c = 3, b = 2],
    [t.a = 2, t.b = 4, t.c = 6, b = 2]
})

Category​

Table.Transformation