Rather than refreshing the entire extract each time, we can configure a refresh to add only the rows that are new since the previous refresh:
- Create a data source using a Text file connection to madrid_2017.csv.
- Select the Extract radio button and click on Edit:

- Select All rows under Number of Rows to extract:

Incremental refresh can only be defined when you are extracting as Single table with the All rows in database.
- Select Incremental refresh and then specify a column that identifies new rows:
- Click on OK and save ...