Learn SQL
Master SQL from fundamentals to advanced analytics with interactive tutorials, real datasets, and hands-on practice exercises.
Start Your SQL Journey
Perfect for complete beginners. Learn the essential SQL concepts with guided examples and practice exercises.
SQL Fundamentals
Learn the basics of SQL including SELECT statements, filtering with WHERE, and sorting results. Perfect starting point for beginners.
Advanced Sorting & Filtering
Master complex WHERE conditions, LIKE pattern matching, IN/BETWEEN operators, NULL handling, and multi-column sorting.
Aggregation Functions
Master data summarization with COUNT, SUM, AVG, MIN, MAX, GROUP BY, and HAVING. Transform raw data into meaningful insights.
Build Your Skills
Ready for more challenge? Dive into joins, aggregations, and data relationships.
Inner Joins
Master INNER JOIN to combine data from multiple tables. Learn when and how to use joins effectively with multiple tables.
Outer Joins
Master LEFT JOIN and NULL detection to preserve all records and find missing data relationships effectively.
Self Joins
Join a table to itself to find relationships, compare rows, navigate hierarchies, and discover patterns within your data.
Master Advanced SQL
Become an SQL expert with advanced analytics, optimization techniques, and complex query patterns.
Subqueries & Derived Tables
Master nested queries for complex filtering, dynamic comparisons, and multi-step analysis with scalar and correlated subqueries.
Window Functions
Master advanced analytics with window functions including ROW_NUMBER, RANK, LAG, LEAD, and running calculations.
CTEs & Recursive Queries
Master Common Table Expressions and recursive queries to solve complex hierarchical problems and build sophisticated analytical queries.
Ready to Practice?
Jump into our interactive SQL editor with real datasets and start building queries right away.
Try SQLSandboxes Editor