Learn How to Write SQL From R
Written by Matt Dancho
This article is part of a R-Tips Weekly, a weekly video tutorial that shows you step-by-step how to do common R coding tasks.
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Writing SQL from R
We’re going to generate SQL from R using 3 key packages:
DBI- For connecting to & working with databases
RSQLite- For working with the SQLite-variety of database
tidyverse- Gives us
dbplyr- the database-backened to dplyr - FOR FREE!! OMG!
Step 1: Connect to database
Use DBI to make a connection
DBI has the
dbConnect() function. Let’s use this to establish a connection with our SQL database.
Examine the connection. You should see a connection object has been created and the SQL database has one table named “MPG”.
Step 2: Write Dplyr, Generate SQL
Use the dbplyr backend to auto-magically create SQL for us.
DBI has the
show_query() function we can use to generate SQL…
…and here’s the result!
1. Full code in the Github Repository.
2. Watch the YouTube Video for detailed instructions.
3. Share with your friends. (Don't be a hog).
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