SQL Basics with Real Queries: SELECT, JOIN and GROUP BY Examples
Learn SQL with one small shop database: CREATE, INSERT, SELECT, WHERE, ORDER BY, GROUP BY, INNER and LEFT JOINs, UPDATE and DELETE, each with its real result table.
Docker Basics for Beginners: Dockerfile, Compose and a Working Example
Learn Docker hands-on: images vs containers, a Dockerfile for a Python API, build, run, ps, logs and stop, then Docker Compose with PostgreSQL. All commands tested.