SQL Learning

SQL is the language used to work with databases: searching, filtering and sorting data, joining tables and building reports. This app teaches SQL from zero to advanced in 100 short, step-by-step lessons.

Each lesson includes a clear explanation, code examples, practice exercises and a short quiz, so you can apply what you learn right away.

📚 Course outline

• Introduction to databases and SQL

• Filtering, sorting and functions

• Aggregation and grouping

• Creating tables and changing data

• Joining tables (JOIN)

• Subqueries, combining tables and CTEs

• Database design

• Window functions

• Performance, security and a final project

✅ Features

• 100 lessons in 10 chapters

• Examples and exercises in every lesson

• A short quiz after each lesson

• Lessons 1 to 20 are free

• Simple, readable design, made for learning on your phone

💳 Free and full version

Lessons 1 to 20 are free. To unlock the rest, make a single one-time payment and get the full course; no subscription and no monthly fees.

✅ Who is it for?

• Beginners who want to work with databases

• Developers and analysts who want to strengthen their SQL skills

• Students preparing for a database course

⚠️ Note

• To run the code for real, you need a database system such as SQLite; the examples are designed for learning and practice.

Your feedback helps us improve the course. Send us a message from the “Contact us” section.

Keywords: SQL, learn SQL, database, query, JOIN, programming, SQL course