In this chapter, we learned a lot about spatial databases. We learned how to create a PostGIS database easily and directly from QGIS. We also learned how to query those PostGIS tables and create visualizations in QGIS from them. We used basic queries, spatial queries, regular joins, and spatial joins to achieve our goals.
In the next chapter, we will dive deeper into PostgreSQL's and PostGIS's structure. We will learn about features easily accessible from pgAdmin. These features can make our work easier and our database more manageable.
