SQL Query Validator
Check SQL syntax for common structural errors - unbalanced parentheses/quotes, and missing clauses - with a dialect selector.
Paste a SQL query and choose a dialect - this tool checks for common structural syntax issues and reports them clearly.
This checks common structural syntax issues, not full compatibility with every feature of every database engine - always test a query against your actual database before relying on it.
What Does This Tool Check?
It checks for common structural syntax problems: unbalanced parentheses, unclosed string quotes, a missing FROM on a SELECT, and similarly detectable structural issues - not a full grammar-level parse against a specific database engine's complete SQL dialect.
Why Use This Tool?
A quick sanity check before running a query against a real database, or when reviewing SQL someone else wrote, to catch an obvious unclosed quote or mismatched parenthesis before it causes a real error.
How to Use It
- Paste your SQL query.
- Choose a dialect: MySQL, PostgreSQL, SQL Server, or SQLite (affects a few dialect-specific checks).
- Click Validate and review any issues found.
Limitations
This does not claim full compatibility with every SQL dialect's complete grammar - it catches common structural mistakes, not every possible semantic error a real database engine would reject.