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Filtering by row
Extracting data by column
9. Select one column
Practice using filter() and select()
The pipe operator
Sorting rows


We know how to extract rows; let's see how to select columns. We'll use something familiar to SQL programmers: the select() command. Like filter(), it takes the dataset name first and then the column name. If we wanted to see all the country names in our dataset, we'd put:

select(countries, country_name)


Extract the continent column from countries.

Stuck? Here's a hint!


select(countries, continent)