What is Challenge Generator?

The Challenge Generator is a smart, modern tool that leverages AI to create personalized SQL exercises based on each user's specific needs and preferences.
It is designed for users who want to strengthen their SQL skills and advance to a professional level.

Why Use the Challenge Generator

Unlimited, auto-generated challenges — no repetition, no ceiling
Sharpen your skills daily with high-quality, practical SQL challenges
Personalized practice based on your skill level and focus areas
Industry-relevant scenarios, always up to date with real-world use cases

Build Your Personalized SQL Challenge

Choose Difficulty

Easy

Intermediate

Hard

Very Hard

Choose Topics For Practice

Beginner

SELECT Basic Questions

Filtering with WHERE

Sorting with ORDER BY

LIMIT & OFFSET

Aggregate functions (SUM, AVG, COUNT, etc.)

GROUP BY and HAVING

Intermediate

Joins (INNER, LEFT, RIGHT, FULL)

Subqueries

CASE statements & conditional logic

Common Table Expressions (CTEs)

UNION and UNION ALL

NULL handling and COALESCE

String functions (LIKE, TRIM, SUBSTRING, etc.)

Date and time functions

Advanced

Window functions (ROW_NUMBER, RANK, etc.)

Data types and conversions

Indexes and performance basics

Advanced filtering (IN, EXISTS, BETWEEN, etc.)

Nested SELECTs and correlated subqueries

Database Operations

Data modification (INSERT, UPDATE, DELETE)

Creating and altering tables (DDL)

Constraints (PRIMARY KEY, FOREIGN KEY, etc.)

Choose Topics For Practice

Beginner

SELECT Basic Questions

Filtering with WHERE

Sorting with ORDER BY

LIMIT & OFFSET

Aggregate functions (SUM, AVG, COUNT, etc.)

GROUP BY and HAVING

Intermediate

Joins (INNER, LEFT, RIGHT, FULL)

Subqueries

CASE statements & conditional logic

Common Table Expressions (CTEs)

UNION and UNION ALL

NULL handling and COALESCE

String functions (LIKE, TRIM, SUBSTRING, etc.)

Date and time functions

Advanced

Window functions (ROW_NUMBER, RANK, etc.)

Data types and conversions

Indexes and performance basics

Advanced filtering (IN, EXISTS, BETWEEN, etc.)

Nested SELECTs and correlated subqueries

Database Operations

Data modification (INSERT, UPDATE, DELETE)

Creating and altering tables (DDL)

Constraints (PRIMARY KEY, FOREIGN KEY, etc.)

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