Skip to content

Updated: 23/06/2026

SQL and MySQL course online

SQL is the query language for databases, and MySQL is one of the most popular database systems. On BitWizards you learn them on your own, isolated database - you write a query, click “Run” and see the result in a table, without installing a server.

Try SQL without signing in

What you will learn

  • SELECT, WHERE, sorting (ORDER BY), aggregate functions.
  • Joining tables (JOIN), grouping (GROUP BY).
  • Modifying data: INSERT, UPDATE, DELETE.
  • The basics of designing tables and relationships.

How you learn on BitWizards

  • Your own database for every student - secure and isolated from others.
  • A “Restore starting data” button - experiment without risk.
  • Automatic checking of your query result against the expected one.

SQL and the INF.03 exam

SQL and databases are an important part of INF.03 (Polish vocational IT qualification). Together with PHP you will build a web application that reads and writes data - exactly what the exam tests.

PHP - HTML and CSS - JavaScript

Start learning SQL

Frequently asked questions

Do I need to install MySQL?

No. Every student gets their own, isolated MySQL database on our server - you write queries in the browser and see the results in a table.

Can I restore the starting data?

Yes. With one click you restore the exercise database to its initial state, so you can experiment without worry.

Is SQL on the INF.03 exam?

Yes. Databases and the SQL language are a significant part of INF.03 - web applications and databases.

Start now

BitWizards is free. Try the demo without signing in, or sign in to the app to save your progress.

Try the demo Sign in

See how to get started