在 R 中为 dbGetQuery 创建日期变量？

Question

basically this is the start of my query/code:

dbGetQuery(con,'SELECT user_id, unique_id
where order_date > parse_datetime('2021-11-01')')

(took out a load because this gets the point across).

The query is quite long and uses the date from above a good few times. So I was wondering if I can create a variable and replace the date.

Something in the format:

date_variable <- 2021-11-01

dbGetQuery(con,'SELECT user_id, unique_id
where order_date > parse_datetime('date_variable')')

I am very new to R and don't really know what I'm doing so any help would be appreciated!

Thanks!

Answer 1

Yes, you can. I prefer to use glue package for this:

library(glue)
library(DBI)

date_variable <- as.Date("2021-11-01")

query <- glue_sql("SELECT user_id, unique_id where order_date > parse_datetime({date_variable})",
         date_variable = date_variable,
         .con = con)

dbGetQuery(con, query)

This source can be interesting for you: Run Queries Safely