Table.ExpandTableColumn

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

function (table as table, column as text, columnNames as list, optional newColumnNames as nullable list) as table

Description

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.

Category

Table.Transformation

Examples

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"})

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