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Định Dạng SQL
Formatter ValidatorĐịnh dạng và xác thực truy vấn SQL.
No output yet
Paste SQL on the left, then click Format or Validate.
Quick wins
- Break long
SELECTlists by comma for easier review. - Put
WHEREconditions on separate lines withAND/OR. - Use explicit
JOIN ... ONblocks instead of comma joins.
Validator limitations
This tool detects common structural issues (quotes/parens/comments). It does not implement full grammar validation for every dialect.
Why Format SQL?
SQL can quickly become complex and difficult to read, especially when dealing with multiple joins, subqueries, and nested conditions. Formatting SQL involves adding consistent indentation, line breaks, and capitalization of keywords. This makes the logic of the query much easier to follow, which is essential for debugging, code reviews, and maintaining large database schemas over time. A well-formatted query is also less prone to logical errors during manual edits.
How to Use This Tool
Paste your raw SQL query into the Input SQL editor on the left. Select your database dialect (Postgres or MySQL) and preferred keyword case (UPPER or lower). Click the Format button to beautify your query with proper indentation and spacing. Use the Validate button to check for common structural issues like unclosed quotes or unbalanced parentheses. Click Copy to save the formatted SQL to your clipboard or Clear to start over.
Common Use Cases
Code reviews to format messy SQL before submitting a pull request. Debugging to clean up queries generated by ORMs to understand exactly what is being executed against your database. Documentation to create clear and readable examples for technical guides, wikis, or README files. Legacy cleanup to quickly refactor old, unformatted scripts into a modern, readable style.
Pro Tips
Use Common Table Expressions (CTEs) with the WITH clause to break down complex queries into smaller, more manageable parts. Always use descriptive aliases for tables and columns to make the intent of your query clear. Use the Minify button if you need to compress your SQL into a single line for use in configuration files or command-line tools.