100 SQL Practice Exercises with Solutions
Already know the basics of SQL and want to improve your skills?
This course is a complete set of 100 real-world SQL challenges — each with a full solution and explanation.
Instead of long theory lessons, you’ll jump straight into solving problems, just like in real IT projects.
What’s inside the course?
We’ve prepared three difficulty levels so you can progress step by step:
Beginner Level – 40 Exercises
Selecting data from a single table
WHERE, ORDER BY, LIMIT clauses
Basic operations on data, aliases, and comparison operators
Intermediate Level – 35 Exercises
Queries combining multiple tables (JOIN)
Grouping data and aggregate functions (GROUP BY, HAVING)
Filters, sorting, and combining queries
Advanced Level – 25 Exercises
Subqueries and nested SELECT statements
Complex multi-step operations
Real-world data analysis problems
How it works
You get a task and try to solve it yourself.
Then you see the step-by-step solution and explanation.
You can compare your approach with mine and learn faster.
Who is this course for?
Anyone who knows basic SQL and wants to practice
Students preparing for job interviews
Testers, analysts, BI specialists, and QA professionals working with data
Developers wanting to keep their SQL skills sharp
Why learn this way?
Because practice is the fastest way to improve. You’ll work with realistic datasets and challenges that mimic real-life scenarios.
By the end of this course, you’ll be able to confidently write and optimize SQL queries, and tackle common database problems you’ll face in the workplace.