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Learn SQL from zero on a real practice database: tables and keys, SELECT, filtering, sorting, changing data, functions, GROUP BY, joins, subqueries and set operations — with every query tested.
Twenty-two pages that take you from "what is a database?" to writing confident multi-table queries. You practise on one small online-shop database the whole way through, in SQLite (it comes with Python), and every place MySQL or PostgreSQL differ is shown and tested on the real servers.
Every page has runnable examples with their real output, common mistakes and how to fix them, exercises from easy to hard with answers, and a summary. It ends with a sales-analytics project and a cheat sheet. Written in English and Bangla.
6 chapters · 325 min total
Watch it taught, then check what stuck.