Inner join with the data.table syntax
In the last exercise, you right joined population to capitals. The result contained all rows from population and had some NAs. In this exercise, you will perform an inner join instead, retaining rows only from both the tables.
Cet exercice fait partie du cours
Joining Data with data.table in R
Instructions
Inner join population to capitals using the data.table syntax.
Exercice interactif pratique
Essayez cet exercice en complétant cet exemple de code.
# Inner join with the data.table syntax
___[population, ___, ___]