Table.ExpandListColumn

Syntax

Table.ExpandListColumn(table as table, column as text) as table

About

Given a table where column contains a list of values, splits the list into a row for each value. Values in the other columns are duplicated in each new row created. This function can also expand nested tables by treating them as lists of records.

Example 1

Split the list column [Name].

Usage

Power Query M

Table.ExpandListColumn(
    Table.FromRecords({[Name = {"Bob", "Jim", "Paul"}, Discount = .15]}),
    "Name"
)

Output

Power Query M

Table.FromRecords({
    [Name = "Bob", Discount = 0.15],
    [Name = "Jim", Discount = 0.15],
    [Name = "Paul", Discount = 0.15]
})

Example 2

Split the nested table column [Components].

Usage

Power Query M

Table.ExpandListColumn(
    #table(
        {"Part", "Components"},
        {
            {"Tool", #table({"Name", "Quantity"}, {{"Thingamajig", 2}, {"Widget", 3}})}
        }
    ),
    "Components"
)

Output

Power Query M

Table.FromRecords({
    [Part = "Tool", Components = [Name = "Thingamajig", Quantity = 2]],
    [Part = "Tool", Components = [Name = "Widget", Quantity = 3]]
})