How do I use dplyr to join two data frames in R?

How do I use dplyr to join two data frames in R?

You can use the left_join(), right_join(), inner_join(), or full_join() functions from dplyr to join data frames.

Can you give me an example of a left join?

Sure! If you have two data frames, df1 and df2, you can do: left_join(df1, df2, by = 'key_column').

What if the key column has different names in both data frames?

You can specify the column names in a named vector: left_join(df1, df2, by = c('df1_key' = 'df2_key')).

Are there any other types of joins I should know about?

Yes, besides left and right joins, there's also inner join, full join, and semi join, each serving different purposes.