Hi, I am trying to rename all my variable names to be completely lowercase. Some of them are have them are like this: Blah_blah, others are like thisIn Spark withColumnRenamed() is used to rename one column or multiple DataFrame column names. Depends on the DataFrame schema In this article, I will explain how to rename a DataFrame column with multiple use cases like rename selected multiple columns, nested struct columns, all...Left joins are a type of mutating join, since they simply add columns to the first table. To perform a left join with sparklyr, call left_join(), passing two tibbles and a character vector of columns to join on. left_join(a_tibble, another_tibble, by = c("id_col1", "id_col2")) When you describe this join in words, the table names are reversed.