SQL syntax validator
Paste a query and check it for syntax errors before running it. Supports multiple dialects — runs entirely in your browser.
What is SQL validation?
SQL validation checks whether a query conforms to the grammar rules of a given SQL dialect. It catches syntax errors — misspelled keywords, unmatched parentheses, missing clauses — before the query ever reaches a database.
This is especially useful when you're writing queries outside of an IDE with built-in linting, such as in a wiki, documentation, Slack message, or script. A quick validation pass can save a round-trip to the database just to discover a typo.
When to use a SQL validator
- Checking queries written in a text editor, wiki, or chat before running them
- Validating SQL snippets in documentation or tutorials
- Sanity-checking generated or templated SQL before deployment
- Learning SQL — getting instant feedback on syntax without needing a live database
- Reviewing query changes in pull requests where you can't run them locally
Syntax checking vs semantic checking
This tool validates syntax — whether the query is grammatically valid SQL. It doesn't check whether the tables, columns, or functions you reference actually exist. For that you'd need a connection to your real database schema. Basedash does that automatically: it connects to your actual data sources and validates queries against your real schema as part of its AI-powered chart building.
FAQ
What does this SQL validator check?
It parses your SQL against the selected dialect's grammar rules and reports any syntax errors it finds. It checks structure, keyword usage, and clause ordering — but it does not validate that table or column names actually exist in a database.
Is my SQL stored or sent to a server?
No. Validation runs entirely in your browser using JavaScript. Your SQL is never transmitted, logged, or stored anywhere.
Why does my query fail validation when it works in my database?
Some databases accept non-standard syntax extensions that the parser doesn't cover. Try switching to a different dialect, or check whether the query uses vendor-specific features like custom operators or proprietary functions.
Can it validate stored procedures or PL/pgSQL?
This tool validates standard SQL statements (SELECT, INSERT, UPDATE, DELETE, CREATE, ALTER, DROP, etc.). Procedural extensions like PL/pgSQL, T-SQL procedures, or MySQL routines may not be fully supported.
Does it check for logical errors?
No. The validator only checks syntax — whether the query is grammatically correct SQL. It won't catch logical issues like joining on the wrong column, missing WHERE clauses, or incorrect aggregation.
Can I validate multiple statements at once?
Yes. Paste multiple semicolon-separated statements and the validator will check each one. If any statement has a syntax error, the error location will be reported.
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