Real-Time SQL Syntax Validator
Stop guessing if your query will run. Validate your SQL syntax instantly against multiple database dialects before executing it in production.
Multi-DB Support
Comprehensive validation for MySQL, PostgreSQL, SQLite, and MariaDB dialects.
AST Analysis
Deep syntax analysis using Abstract Syntax Tree parsing to catch subtle structural errors.
Instant Feedback
Get immediate error reporting with line numbers and helpful suggestions for fixes.
Why Validate SQL Before Execution?
Running invalid SQL queries isn't just annoying—it can be dangerous. A syntax error in a production migration script can leave your database in an inconsistent state. Our validator helps you catch these issues early.
- Prevent Runtime Errors: Catch syntax mistakes before they hit your database server.
- Debug Faster: Instead of cryptic database error codes, get clear, specific feedback on what's wrong.
- Learn Best Practices: Understand the nuances between different SQL dialects (e.g., quoting rules in MySQL vs PostgreSQL).
Common SQL Errors We Catch
Even experienced developers make mistakes. Our tool automatically detects:
- Missing Keywords: Forgot a
FROM or WHERE clause? We'll spot it. - Unclosed Quotes: Mismatched single or double quotes are a common source of frustration.
- Invalid Column References: Using reserved words as identifiers without proper quoting.
- Dialect Mismatches: Using MySQL-specific syntax (like backticks) in a PostgreSQL query.
How to Use
- Select your target database dialect from the dropdown menu.
- Paste your SQL query into the editor.
- The validation status updates instantly as you type.
- If an error is found, review the specific error message and line number to fix it.