SQL Query Runner & Simulator
Test and execute SQL queries against sample databases. Perfect for learning SQL, testing query logic, and practicing database operations.
SQL Query
Query Results
Results will appear here after query execution
Sample Database Schema
customers table
customer_id INT PRIMARY KEY first_name VARCHAR(50) last_name VARCHAR(50) email VARCHAR(100) country VARCHAR(50)
products table
product_id INT PRIMARY KEY product_name VARCHAR(100) category VARCHAR(50) price DECIMAL(10,2) stock_quantity INT
orders table
order_id INT PRIMARY KEY customer_id INT FOREIGN KEY order_date DATE total_amount DECIMAL(10,2)
SQL Query Runner – Practice SQL Queries Online
The SQL Query Runner is an interactive SQL simulation tool that allows you to write and execute SQL queries against a sample database. It's perfect for learning SQL, testing query logic, and practicing database operations without setting up a real database.
Key Features
- Interactive Query Execution – Write SQL and see immediate results
- Sample Database – Preloaded with customers, products, and orders data
- Multiple Query Types – Supports SELECT, INSERT, UPDATE, DELETE, CREATE
- Performance Metrics – See execution time and rows affected
- Sample Queries – Pre-built examples for common operations
- Results Export – Copy or download query results as JSON
- Schema Visualization – View database structure and relationships
How to Use
- Write your SQL query in the query editor or load a sample query
- Click &qout;Execute Query&qout; to run the query against the sample database
- View the results in the results table
- Check execution statistics (time and rows affected)
- Copy or download results for further analysis
- Experiment with different queries to learn SQL concepts
Sample Database Schema
The tool includes a sample relational database with three main tables:
- customers – Customer information including names and contact details
- products – Product catalog with prices and stock information
- orders – Customer orders with dates and amounts
These tables have appropriate relationships (foreign keys) to demonstrate JOIN operations.
Learning Resources
Use this tool to practice:
- Basic SELECT statements with WHERE clauses
- JOIN operations (INNER JOIN, LEFT JOIN)
- Aggregation with GROUP BY and HAVING
- Data modification with INSERT, UPDATE, DELETE
- Sorting and limiting results with ORDER BY and LIMIT
- Subqueries and derived tables
Ideal For
- SQL beginners learning the language
- Developers testing query logic
- Students completing SQL assignments
- Interview preparation for database roles
- Quick prototyping of complex queries
Frequently Asked Questions
The SQL Query Runner is a simulation tool that allows you to write and execute SQL queries against a sample database. It shows you the expected results without connecting to a real database.
No, this is a simulation tool. It uses a predefined sample dataset to demonstrate query execution. No actual database connections are made.
The simulator supports SELECT, INSERT, UPDATE, DELETE, and CREATE TABLE statements. JOIN operations, WHERE clauses, ORDER BY, and other common SQL features are also simulated.
Queries are not automatically saved, but you can copy them to your clipboard or save them in your own files. The browser may retain your input temporarily.
Yes! This is an excellent tool for learning SQL. You can experiment with different queries and see immediate results without setting up a database.
The sample database includes customers, products, and orders tables with realistic data. You can query these tables to practice different SQL operations.
