all_uppercase()
select all columns with upper case namesall_lowercase()
select all columns with lower case namesall_labelled()
select all columns with a label attribute
Examples
df <- data.frame(ONE = 1, two = 2)
df |> select(all_uppercase())
#> ONE
#> 1 1
df |> select(all_lowercase())
#> two
#> 1 2
df |>
labelled::set_variable_labels(ONE = "First Column") |>
select(all_labelled())
#> ONE
#> 1 1