SQL Formatter

Common SQL formatting conventions include placing major clauses (SELECT, FROM, WHERE, JOIN) on separate lines, indenting column lists and conditions, aligning keywords vertically, and using consistent casing. These practices make complex queries easier to read, review, and debug.

Uppercasing SQL keywords (SELECT, FROM, WHERE) is a widely adopted convention that visually separates SQL syntax from table and column names. This makes queries easier to scan, especially in code reviews or documentation. While SQL is case-insensitive for keywords, uppercase is the dominant convention in the industry.

Subqueries should be indented one level deeper than their parent query and enclosed in parentheses. Each clause within the subquery should follow the same formatting rules as a top-level query. This nesting makes the logical structure visible at a glance.

This formatter handles standard SQL syntax that works across most database systems including PostgreSQL, MySQL, SQL Server, Oracle, and SQLite. Dialect-specific extensions like PostgreSQL array syntax or MySQL backtick quoting are preserved as-is during formatting.

No. SQL formatting is purely cosmetic and has zero impact on query execution. The database engine parses and optimizes the query regardless of whitespace or casing. Formatting is solely for human readability and code maintenance.