leoisole/sql_practice ? reverse-engineered prompt

Build me a simple SQL practice project that helps me learn by doing.

I want a set of example tables with sample data, plus a bunch of ready to run queries for common things like SELECT and COUNT so I can practice and compare results. Please also include the SQL needed to create the schema and load the data, and keep the examples easy to read and edit. If it makes sense, add a small notes section for PostgreSQL setup details too, like connection or port tips.

Make it feel like a beginner friendly practice workspace, not a big app. I mainly want something I can open, run, tweak, and learn from. If you need to check current Postgres syntax or best practices, look up the latest docs online.