How To Use SQL Formatter & Validator
📝 Step 1: Enter SQL Code
Paste your SQL query in the input area. Supports multiple statements and various SQL dialects.
⚙️ Step 2: Choose SQL Dialect
Select your database type (MySQL, PostgreSQL, SQL Server, or Oracle) for accurate validation.
🔧 Step 3: Format or Validate
Click "Format SQL" to beautify your code with proper indentation. Click "Validate SQL" to check for syntax errors.
📋 Step 4: Copy or Download
Use the "Copy" button to copy formatted SQL to clipboard, or "Download" to save as .sql file.
💡 Pro Tips
- Use the Sample button to load an example query
- Validation checks for: missing keywords, incorrect syntax, unmatched parentheses, invalid identifiers
- Formatting preserves comments and string literals
- Works with complex queries including JOINs, subqueries, and UNIONs
🔍 Example
-- Before formatting:
SELECT u.id,u.name,COUNT(o.id)as c FROM users u LEFT JOIN orders o ON u.id=o.user_id WHERE u.age>18 GROUP BY u.id HAVING COUNT(o.id)>5;
-- After formatting:
SELECT
u.id,
u.name,
COUNT(o.id) AS c
FROM users u
LEFT JOIN orders o ON u.id = o.user_id
WHERE u.age > 18
GROUP BY u.id
HAVING COUNT(o.id) > 5;
Frequently Asked Questions
What SQL dialects are supported?
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We support MySQL, PostgreSQL, SQL Server (T-SQL), and Oracle PL/SQL. Each dialect has its own validation rules for keywords, functions, and syntax.
Does it validate all SQL syntax?
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The validator checks for common syntax errors including: missing or incorrect keywords, unmatched parentheses, invalid identifiers, missing commas, incorrect JOIN syntax, and basic semantic rules. It's designed for standard SQL operations.
What formatting options are available?
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The formatter adds proper indentation, line breaks after clauses (SELECT, FROM, WHERE, etc.), aligns JOIN conditions, capitalizes keywords, and preserves comments and string literals. It makes your SQL clean and readable.
Can I format multiple SQL statements?
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Yes! The tool handles multiple statements separated by semicolons. Each statement is formatted independently while maintaining overall readability.
Is my SQL data secure?
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Absolutely. All processing happens in your browser. Your SQL code is never sent to our servers. It's completely client-side for privacy and security.
What are common SQL errors it detects?
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Common errors include: missing FROM clause, incorrect JOIN syntax, unmatched parentheses, invalid ORDER BY usage, missing GROUP BY columns, and incorrect function usage.
Does it work with stored procedures?
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Basic stored procedure syntax is supported (CREATE PROCEDURE, BEGIN/END, DECLARE). For complex procedural code, validation may be limited to SQL statements within.
How accurate is the validation?
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The validator catches most syntax errors but may not catch database-specific schema issues (like missing tables or columns) since it doesn't connect to your database. It's great for syntax checking and quick formatting.