Table.DuplicateColumn

Duplicates a column with the specified name. Values and type are copied from the source column.

Syntax

Table.DuplicateColumn(
    table as table,
    columnName as text,
    newColumnName as text,
    optional columnType as type
) as table

Duplicate the column named columnName to the table table. The values and type for the column newColumnName are copied from coulmn columnName.

Duplicate the column "a" to a column named "copied column" in the table <code>({[a = 1, b = 2], [a = 3, b = 4]})</code>.

Table.DuplicateColumn(
    Table.FromRecords({
        [a = 1, b = 2],
        [a = 3, b = 4]
    }),
    "a",
    "copied column"
)

Result:

Table.FromRecords({
    [a = 1, b = 2, #"copied column" = 1],
    [a = 3, b = 4, #"copied column" = 3]
})