Online SQL Compiler Features
Enterprise Database Simulation
- SQLite 3.44 Engine - Same SQL dialect used by every iPhone, Android device, and major browsers worldwide
- Full DDL Support - CREATE, ALTER, DROP tables with constraints, indexes, and triggers just like production databases
- Transaction Control - Practice ACID compliance with BEGIN, COMMIT, ROLLBACK for data integrity
- Multi-Table Operations - Design normalized schemas with foreign keys and test referential integrity
- View Creation - Build complex views to simplify queries and hide implementation details
Advanced Query Development
- Window Functions - Master ROW_NUMBER(), RANK(), LEAD/LAG for analytics and reporting
- Common Table Expressions - Write readable recursive queries for hierarchical data and graph traversal
- Complex JOINs - Practice INNER, LEFT, RIGHT, FULL OUTER, CROSS, and self-joins with real scenarios
- Query Optimization - Use EXPLAIN QUERY PLAN to understand index usage and performance
Data Analysis Powerhouse
- Aggregate Functions - GROUP BY with HAVING, ROLLUP, and statistical functions for business intelligence
- JSON Operations - Query and manipulate JSON data with json_extract() and json_array()
- Date/Time Functions - Handle temporal data with datetime(), julianday(), and strftime()
- Regular Expressions - Pattern matching with REGEXP for complex text analysis
Interview & Learning Platform
- FAANG Interview Prep - Practice LeetCode database problems and common SQL assessments
- Instant Schema Testing - Prototype database designs before implementing in MySQL or PostgreSQL
- Share Solutions - Generate URLs for code reviews, Stack Overflow answers, or teaching
- No Setup Required - Start writing SQL immediately without installing database servers
SQL Keyboard Shortcuts
Experience the power of Replit AI
This entire SQL compiler was built by Replit Agent 3 from a natural language prompt. Replit's environment facilitates rapid development, iteration and testing code for users of any technical ability. Develop software faster and better with Replit’s autonomous AI.
Get started freeFrequently Asked Questions
Is SQLite different from MySQL or PostgreSQL?
SQLite uses standard SQL syntax that's 95% compatible with other databases. Queries you write in this sql online compiler work in MySQL, PostgreSQL, and SQL Server with minor adjustments. It's perfect for learning SQL fundamentals and testing database designs.
Can I create multiple related tables with foreign keys?
Absolutely! Create complete database schemas with foreign key constraints, cascading deletes, and complex relationships. This sql editor enforces referential integrity just like production databases, making it ideal for schema prototyping.
Do window functions and CTEs work here?
Yes! SQLite supports advanced SQL features including window functions (ROW_NUMBER, RANK, LEAD/LAG), recursive CTEs, and PIVOT operations. Practice modern SQL analytics that transfer directly to enterprise data warehouses.
How can I practice for SQL interviews?
This sql code runner is perfect for technical interviews. Create sample data, solve LeetCode database problems, and practice common patterns like finding duplicates, calculating running totals, and hierarchical queries. Share your solutions via URL for portfolio building.
What about query performance and optimization?
Use EXPLAIN QUERY PLAN to see execution strategies, create indexes to improve performance, and analyze query costs. While this online sql compiler uses in-memory databases, the optimization principles apply to all SQL databases.
Can I import existing data or schemas?
Paste CREATE TABLE and INSERT statements directly into the editor. You can recreate any database schema by copying SQL dumps. For advanced import features and persistent storage, sign up for Replit to fork and customize this sql online editor with AI assistance.
How large can my test database be?
The in-memory database handles thousands of rows comfortably for learning and prototyping. For larger datasets or persistent storage, consider signing up for Replit where you can fork this sql compiler and extend it with real database connections.
Does this support stored procedures and functions?
SQLite supports triggers and simple user-defined functions, though not full stored procedures like MySQL or PostgreSQL. Focus on mastering SQL queries, joins, and data modeling—skills that transfer to any database platform.
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