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Table.SelectColumns

Returns a table with only the specified columns.

Syntax​

Table.SelectColumns(
    table as table,
    columns as any,
    optional missingField as MissingField.Type
) as table

Remarks​

Returns the table with only the specified columns.

  • table: The provided table.
  • columns: The list of columns from the table table to return. Columns in the returned table are in the order listed in columns.
  • missingField: (Optional) What to do if the column does not exist. Example: MissingField.UseNull or MissingField.Ignore.

Examples​

Example #1​

Only include column [Name].

Table.SelectColumns(
    Table.FromRecords({
        [CustomerID = 1, Name = "Bob", Phone = "123-4567"],
        [CustomerID = 2, Name = "Jim", Phone = "987-6543"],
        [CustomerID = 3, Name = "Paul", Phone = "543-7890"],
        [CustomerID = 4, Name = "Ringo", Phone = "232-1550"]
    }),
    "Name"
)

Result:

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

Example #2​

Only include columns [CustomerID] and [Name].

Table.SelectColumns(
    Table.FromRecords({[CustomerID = 1, Name = "Bob", Phone = "123-4567"]}),
    {"CustomerID", "Name"}
)

Result:

Table.FromRecords({[CustomerID = 1, Name = "Bob"]})

Example #3​

If the included column does not exist, the default result is an error.

Table.SelectColumns(
    Table.FromRecords({[CustomerID = 1, Name = "Bob", Phone = "123-4567"]}),
    "NewColumn"
)

Result:

[Expression.Error] The field 'NewColumn' of the record wasn't found.

Example #4​

If the included column does not exist, option <code>MissingField.UseNull</code> creates a column of null values.

Table.SelectColumns(
    Table.FromRecords({[CustomerID = 1, Name = "Bob", Phone = "123-4567"]}),
    {"CustomerID", "NewColumn"},
    MissingField.UseNull
)

Result:

Table.FromRecords({[CustomerID = 1, NewColumn = null]})

Category​

Table.Column operations