Summary
In this chapter, additional SQL expressions were presented with real-world, publicly available datasets. You learned how to import CSV files into QGIS for use across your spatial databases. Exploring different ways to join data on the fly and continue querying inside QGIS reinforced the advantages of writing queries within the graphic interface.
In the next chapter, you will be introduced to 2020 census data and continue exploring how to join tables and ask more complex questions with SQL.