Querying a database from within R

August 18, 2012

[This article was first published on NERD PROJECT » R project posts, and kindly contributed to R-bloggers]. (You can report issue about the content on this page here)
Want to share your content on R-bloggers? click here if you have a blog, or here if you don't.

For a while now I have been contemplating pulling data from our postgreSQL db directly from R, but just never actually pulled the trigger until today.  What I found was that it was a lot easier than I ever could have imagined.  My laptop was already on the VPN, so I decided to try it locally before deploying our R studio server.  After a bit of researching, I decided to use the the RPostgreSQL CRAN package.  It literally only takes two lines of code and you are ready to go.

drv <- dbDriver("PostgreSQL")
con <- dbConnect(drv, dbname="database", host="", port="", user="", password="")

The first line installs the driver, in my case a postgreSQL driver, the second line actually connects you to your database.  All you have to do is input the name of the db, host, port, username, and password.  After that, you ready to query!

ba <- dbGetQuery(con,"select * from badass limit 100")

To leave a comment for the author, please follow the link and comment on their blog: NERD PROJECT » R project posts.

R-bloggers.com offers daily e-mail updates about R news and tutorials about learning R and many other topics. Click here if you're looking to post or find an R/data-science job.
Want to share your content on R-bloggers? click here if you have a blog, or here if you don't.

If you got this far, why not subscribe for updates from the site? Choose your flavor: e-mail, twitter, RSS, or facebook...

Comments are closed.

Search R-bloggers


Never miss an update!
Subscribe to R-bloggers to receive
e-mails with the latest R posts.
(You will not see this message again.)

Click here to close (This popup will not appear again)