Google's new pipe syntax in SQL

>>heyden+(OP)
That is basically R with tidyverse.

  flights |>
    filter(
      carrier == "UA",
      dest %in% c("IAH", "HOU"),
      sched_dep_time > 0900,
      sched_arr_time < 2000
      ) |>
    group_by(flight) |>
    summarize(
      delay = mean(arr_delay, na.rm = TRUE),
      cancelled = sum(is.na(arr_delay)),
      n = n()
      ) |>
    filter(n > 10)

If you haven't used R, it has some serious data manipulation legs built into it.

>>minkle+nGa
An interesting thing to me about all these dplyr-style syntaxes is that Wickham thinks the group_by operator was a design mistake. In modern dplyr you can often specify a .by on an operation instead. I found switching to this style a pretty easy adjustment, and I think it’s a bit better. Example:

  d |> filter(id==max(id),.by=orderId)

I think PRQL were thinking a bit about ways to avoid a group_by operation and I think what they have is a kind of ‘scoped’ or ‘higher order’ group_by operation which takes your grouping keys and a pipeline and outputs a pipeline step that applies the inner pipeline to each group.

zlacker