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MySQL Sakila Example Using R

This capsule is intended to show an example reproducible run that queries the example Sakila database. The Sakila sample database is designed to represent a DVD rental store.

Set up credentials

In order to run this capsule, you will need to add your database credentials to the environment. See the secrets management guide for more information.

App Panel Parameters

Hostname

  • This is the hostname of the server which serves the MySQL database. Note: This server must TCP allow access from the Code Ocean VPC over the 3306 port. [default: jsnedecor-mysql.cm7kuqeedvj0.us-east-1.rds.amazonaws.com]

Database

  • Database name to connect to. [default: sakila]

MySQL connections pane

In order to interactively work with MySQL, launch a RStudio cloud workstation.

First we need to connect to the MySQL database in the connections pane. In order to do this, execute the following lines from the database_connection.R file:

#!/usr/bin/env Rscript
library(DBI)
library(odbc)

source("config.R")



# Database connection (note: MariaDB is identical to MySQL and the connection driver in R is newer)
con <- dbConnect(odbc::odbc(),
                 Driver   = "MySQL Driver",
                 database=DATABASE,
                 UID=DATABASE_USERNAME,
                 PWD=DATABASE_PASSWORD, 
                 server=HOST)

Make sure that the database and server are correctly set in the config.R file since we are using an interactive workstation.

If we want to preview the content in a table, we can click on the preview button next to each table in the database

Now, we want to open a sql file in order to execute queries. First click on the "SQL" button in order to open a new sql file. Save it to the code directory.

If we want to see the output of running a query, we can click the "preview" button in order to see the output.

For more information, please refer to the RStudio documentation.