dbplyr(dplyr ..)企 蟆 れ.
[https](https://www.r-bloggers.com/dbplyr-1-1-0/) 覲企 覩 れ れ.
企 蟆..

con <- DBI::dbConnect(RSQLite::SQLite(), ":memory:")
DBI::dbWriteTable(con, "iris", iris)

iris2 <- tbl(con, "iris")

species_mean <- iris2 %>%
  group_by(Species) %>%
  summarise_all(mean)