Don't forget the venerable SQLZoo - I have referred a zillion people to it over the years. https://www.sqlzoo.net/wiki/SQL_Tutorial https://www.sqlzoo.net/wiki/

Don't forget the venerable SQLZoo - I have referred a zillion people to it over the years. https://www.sqlzoo.net/wiki/SQL_Tutorial https://www.sqlzoo.net/wiki/SQL_Tutorial Edit: also an inaccuracy that's minor but can bite you if you're not careful - they mention temporary tables are in memory not on disk - that's not true in almost all sql databases, they are just connection specific eg they don't persist after you disconnect. Some databases are optimized for a temp table to be a throwaway, but that can be a good or bad thing depending on the use case.