Relatedly: the appendix section "SQL Primer" in Obe and Hsu's 'PostGIS in Action' is my favorite quick intro to SQL and the first stop I give anyone looking to

Relatedly: the appendix section "SQL Primer" in Obe and Hsu's 'PostGIS in Action' is my favorite quick intro to SQL and the first stop I give anyone looking to learn about the language. https://www.manning.com/books/postgis-in-action-second-edition https://www.manning.com/books/postgis-in-action-second-editi...