SQL Validator
Validate SQL syntax and catch common query risks before running database statements.
SQL Validator
Check SQL before running it. This validator parses and formats SQL in the browser, catches broken parentheses or quotes, and flags common risky statements.
Useful checks
- Syntax parse errors from common SQL dialects
- UPDATE or DELETE statements without WHERE clauses
- Destructive DROP and TRUNCATE statements
- Statement count, line count, and formatted SQL output
How to use SQL Validator
The SQL validator checks a query for syntax problems and common risks before you run it. It is a quick review step, not a replacement for a database test.
Developers often use this page when they need sql checker, sql validator, sql tester, and sql linter.
Privacy and data handling
This tool can handle security-sensitive text, so it is meant for local inspection and test data.
- Normal use does not require uploading your input to a server.
- Use redacted tokens, passwords, secrets, headers, and connection strings when possible.
- Copy buttons use your browser clipboard permission, so clear the clipboard after handling secrets.
Examples
Catch a simple SQL typo
Input
SELECT id name FROM usersOutput
Possible issue: missing comma between selected columnsA validator can catch syntax problems, but final behavior still depends on your database.
Steps
- 1Paste the SQL query into the editor.
- 2Run validation and read any warnings.
- 3Fix the query and test it in your database.
Common use cases
- Catch simple SQL syntax errors.
- Review a query before sharing it.
- Check risky statements in a copied snippet.
Practical tips
- Different databases have different SQL dialects.
- Validation cannot prove a query is safe for production data.
- Use transactions or read-only replicas when testing risky queries.
FAQ
Can a SQL validator find every error?
No. It can catch many syntax issues, but database-specific behavior and schema errors may only appear when you run the query.
Does this prevent SQL injection?
No. Use parameterized queries and server-side validation to prevent SQL injection.