Best SQL Fiddle Alternatives: A Comprehensive Comparison

Table of Contents

1. Introduction
2. Top SQL Fiddle Alternatives
   • RunSQL.com
   • DB Fiddle
   • SQLize Online
3. Feature Comparison Table
4. Which SQL Playground is Right for You?
   • Best for Beginners
   • Best for Multi-Database Testing
   • Best for Team Collaboration
5. Conclusion & Call to Action

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Introduction

SQL Fiddle’s user interface showing schema and query panels

SQL Fiddle has long been a popular online SQL editor for testing queries, but many developers are now looking for a SQL Fiddle alternative due to its limitations. Issues like slow performance on complex queries, manual setup for schemas and data, and minimal collaboration features can hinder productivity.

Key Features:

• Database Support: MySQL, PostgreSQL, SQL Server, Oracle, SQLite.
• Schema Setup: Manual SQL-based schema creation.
• Data Import: Requires manual SQL inserts.
• Execution: Runs queries in a web-based sandbox.
• Collaboration: Shareable query URLs.
• Performance: Can be slow on complex queries.

Several SQL playgrounds (online SQL editors) provide different features to address these pain points. This guide compares some of the best online SQL editors, highlighting their features, performance, and use cases.

Why Look for an SQL Fiddle Alternative?

• Performance Issues: SQL Fiddle can be slow, especially with large queries.
• Manual Schema Creation: Requires writing SQL CREATE TABLE statements manually.
• Limited Collaboration: Basic sharing, but lacks full workspace collaboration.
• Alternative Options: Newer tools offer different features, improved UX, and better execution speeds.

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Top SQL Fiddle Alternatives

RunSQL.com

RunSQL’s modern interface with visual schema builder and query editor

RunSQL.com is a modern SQL playground that provides an intuitive interface, cloud-based execution, and easy schema management. Unlike SQL Fiddle, RunSQL includes tools for visual schema design and data import, reducing manual SQL setup.

Key Features:

• Multi-Database Support: PostgreSQL, MySQL, SQL Server.
• Schema Creation: Uses DBML-powered schema definition.
• Data Import: Supports CSV/spreadsheet uploads.
• Cloud Execution: Fast, web-based SQL execution.
• Collaboration: Shareable workspaces (queries + data).
• Pricing: Free to use.

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DB Fiddle

DB Fiddle’s interface showing schema and query editors

DB Fiddle is a simple web-based SQL testing tool with support for multiple databases. It provides a minimalistic interface for writing and executing SQL queries.

Key Features:

• Database Support: MySQL, PostgreSQL, SQLite.
• Schema Setup: SQL-based, manual creation.
• Execution: Online SQL sandbox.
• Collaboration: Share queries via links.
• Performance: Generally responsive for simple queries.

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SQLize Online

SQLize Online’s interface with query editor and results panel

SQLize Online allows SQL queries to be written and executed across various database systems, but it remains a simple tool with minimal additional features.

Key Features:

• Database Support: MySQL, PostgreSQL, SQL Server, SQLite, Oracle, MariaDB.
• Schema Setup: Manual SQL statements.
• Execution: Runs queries instantly online.
• Collaboration: Share SQL snippets via URLs.
• Best For: Users who need quick query execution.

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Feature Comparison Table

Feature	RunSQL.com	SQL Fiddle	DB Fiddle	SQLize Online
Database Support	PostgreSQL, MySQL, SQL Server	MySQL, PostgreSQL, SQL Server, Oracle, SQLite	MySQL, PostgreSQL, SQLite	MySQL, PostgreSQL, SQL Server, SQLite, Oracle, MariaDB
Schema Creation	DBML visual builder	Manual SQL	Manual SQL	Manual SQL
Data Import	CSV, Spreadsheet UI	Manual INSERT	Manual INSERT	Manual INSERT
Query Performance	Cloud Execution (Fast)	Can be slow	Moderate	Moderate
Collaboration	Share full workspace (queries + data)	Shareable link	Shareable link	Shareable SQL snippets
Pricing	Free	Free	Free	Free

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Which SQL Playground is Right for You?

Best for Beginners

• RunSQL.com: Simple UI, visual schema creation, easy data import.
• SQL Fiddle: Works for basic testing but requires SQL knowledge.

Best for Multi-Database Testing

• RunSQL.com: Supports PostgreSQL, MySQL, SQL Server.
• DB Fiddle: Supports MySQL, PostgreSQL, SQLite.
• SQLize Online: Covers broader database support, including MariaDB and Oracle.

Best for Team Collaboration

• RunSQL.com: Share full SQL workspaces (schema + data).
• SQL Fiddle & DB Fiddle: Basic query-sharing links.
• SQLize Online: Share SQL snippets only.

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Conclusion & Call to Action

SQL Fiddle has been a useful tool for many years, but several SQL playgrounds now provide enhanced performance, schema creation tools, and collaboration features. Each alternative has its strengths, depending on the user’s needs.

For those looking for a more modern SQL testing environment, RunSQL.com provides an easy-to-use interface, cloud execution, and streamlined data import. However, developers who prefer manual setup and simple query testing may find SQL Fiddle, DB Fiddle, or SQLize Online to be suitable options.

✅ Explore different SQL playgrounds and find the best fit for your workflow.