Extract a dplyr tbl column as a vector

Question

Is there a more succinct way to get one column of a dplyr tbl as a vector, from a tbl with database back-end (i.e. the data frame/table can\'t be subset directly)?

Answer 1

I would use the extract2 convenience function from magrittr:

library(magrittr)
library(dplyr)

iris2 %>%
  select(Species) %>%
  extract2(1)