dittodb uses the nycflights13 dataset (from the nycflights13 package) for testing and example purposes.

Exploring nycflights13

The nycflights13 dataset contains airline on-time data for all flights departing NYC in 2013. It also includes useful ‘metadata’ on airlines, airports, weather, and planes.

Have a look to the database schema:

nycflights13 relational diagram.