Sample Queries:
Syntax Validation
Check for syntax errors and typos
SQL Injection Detection
Identify potential security risks
Best Practices
Get suggestions for optimization
Multi-Dialect Support
MySQL, PostgreSQL, SQL Server, Oracle, SQLite
Auto-Fix
Automatic correction suggestions
Client-Side
All processing in your browser
SQL syntax errors can crash applications, corrupt data, and waste hours of debugging time. Our SQL validator catches syntax errors, SQL injection vulnerabilities, and common mistakes before they reach production, helping you write cleaner, safer, and more efficient database queries.
🔍 Multi-dialect support - Validates MySQL, PostgreSQL, SQL Server, Oracle, and SQLite
🛡️ Security scanning - Detects potential SQL injection vulnerabilities
⚡ Instant feedback - Real-time validation as you type your queries
💡 Smart suggestions - Get auto-fix recommendations for common errors
📚 Syntax highlighting - Color-coded SQL for better readability
🎯 Best practices - Learn proper SQL formatting and optimization techniques
Always Use Parameterized Queries
Never concatenate user input directly into SQL strings. Use prepared statements and parameterized queries to prevent SQL injection attacks. This is the #1 rule for secure database applications.
Validate Before Production
Test all queries in a development environment before deploying. Use this validator to catch syntax errors early, then verify with actual data in staging to catch logic errors.
Use Explicit Column Names
Avoid SELECT * in production code. Explicitly list columns you need for better performance, maintainability, and to prevent issues when table schemas change.
Add Meaningful Comments
Document complex queries with comments explaining the business logic. Future you (and your team) will thank you when maintaining queries months later.
Index Your WHERE Clauses
Ensure columns used in WHERE, JOIN, and ORDER BY clauses have appropriate indexes. Our validator highlights potentially slow queries that could benefit from indexing.