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


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.

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"})
t.a t.b t.c b
1 2 3 2
2 4 6 2