SQL Formatter & Beautifier

How to Format SQL Queries

1. Paste your SQL: Enter your SQL query into the editor. The tool supports all standard SQL dialects.
2. Format for readability: Click "Format SQL" to beautify your query with proper indentation and line breaks.
3. Minify for production: Click "Minify" to compress SQL into a single line with minimal whitespace.
4. Uppercase keywords: Click "Uppercase Keywords" to capitalize SQL keywords following standard conventions.
5. Copy the result: Click "Copy" to copy the formatted SQL to your clipboard.

SQL Formatting Features

Syntax highlighting: Keywords, functions, strings, numbers, and operators are color-coded for easy reading and error spotting.

Smart indentation: Nested queries, JOIN clauses, and subqueries are automatically indented for better visual hierarchy.

Line breaks: Major clauses (SELECT, FROM, WHERE, JOIN, ORDER BY) are placed on separate lines for clarity.

Keyword formatting: Convert keywords to uppercase following SQL style conventions.

Comment preservation: Single-line (--) and multi-line (/* */) comments are preserved and highlighted.

What is SQL?

SQL (Structured Query Language) is the standard language for managing and manipulating relational databases. It allows you to query, insert, update, and delete data, create and modify database structures, and control access permissions. SQL is used by virtually all relational database systems including MySQL, PostgreSQL, SQL Server, Oracle, SQLite, and MariaDB.

Well-formatted SQL is easier to read, debug, and maintain. It helps teams collaborate effectively, reduces errors, and makes complex queries more understandable. Following consistent formatting conventions is considered a best practice in database development and administration.

Common SQL Keywords

Data Query: SELECT, FROM, WHERE, GROUP BY, HAVING, ORDER BY, LIMIT

Data Manipulation: INSERT, UPDATE, DELETE, MERGE

Joins: JOIN, INNER JOIN, LEFT JOIN, RIGHT JOIN, FULL OUTER JOIN, CROSS JOIN

Data Definition: CREATE, ALTER, DROP, TRUNCATE, TABLE, INDEX, VIEW

Functions: COUNT, SUM, AVG, MAX, MIN, CONCAT, SUBSTRING, DATE

SQL Formatting Best Practices

One clause per line: Place each major clause (SELECT, FROM, WHERE) on its own line for better scanability.

Indent subqueries: Indent nested queries to show hierarchy and make complex queries easier to understand.

Align columns: In SELECT statements with many columns, list one column per line and align them vertically.

Use meaningful aliases: Give tables and columns clear, descriptive aliases that make queries self-documenting.

Comment complex logic: Add comments to explain non-obvious joins, filters, or business logic.

Consistent keyword case: Choose uppercase or lowercase for keywords and be consistent throughout your codebase.

Database Compatibility

This formatter works with standard SQL syntax and is compatible with all major database systems. However, different databases have their own extensions and dialects. MySQL uses backticks for identifiers, SQL Server uses square brackets, and PostgreSQL has special operators like :: for casting. The formatter preserves these database-specific features while improving overall readability.

Related Tools

Working with JSON data from database queries? Use the JSON Formatter to beautify results. Compare SQL query versions with the Diff Checker or convert data with the CSV to JSON Converter.