Record.FieldNames Function in Power Query
The Record.FieldNames function returns a list of field names in order of the record's fields.
Syntax
 Record.FieldNames(record as record) as list 
Example: Returns the field names from the record.
Power Query M
let
  MyTable = Table.FromRecords(
    {
      [CustomerID = 1, Name = "Ashish", Phone = "123-4567"], 
      [CustomerID = 2, Name = "Katrina", Phone = "987-6543"], 
      [CustomerID = 3, Name = "Alia", Phone = "543-7890"], 
      [CustomerID = 4, Name = "Vicky", Phone = "676-8479"], 
      [CustomerID = 5, Name = "Mohini", Phone = "574-8864"], 
      [CustomerID = 6, Name = "Meenakshi", Phone = "574-8864"], 
      [CustomerID = 7, Name = "Esha", Phone = "574-8864"], 
      [CustomerID = 8, Name = "Anjali", Phone = "574-8864"]
    }
  ),
    ReturnFieldNames = Record.FieldNames(MyTable{1})
in
    ReturnFieldNames  The output will be as shown in the following image:
