SQL Query Formatter & Beautifier

Format, beautify, and minify SQL queries in real-time. Standardize uppercase/lowercase keyword casing, indent column clauses, and optimize queries.

Input SQL Query

Sample SQL Queries
SQL Beautifier Output
17 Lines

Clauses

13

Mode

UPPER

Indent

2 sp

Standard

ANSI SQL

Formatted SQL Code303 chars
SELECT u.id,
  u.email,
  count(o.id) 
AS total_orders,
  sum(o.total_amount) 
AS lifetime_spend 
FROM users u 
LEFT 
JOIN orders o 
ON u.id = o.user_id 
WHERE u.status = 'active' 
AND u.created_at >= '2026-01-01' 
GROUP BY u.id,
  u.email 
HAVING count(o.id) > 5 
ORDER BY lifetime_spend desc 
LIMIT 50
Minified Production SQL

select u.id, u.email, count(o.id) as total_orders, sum(o.total_amount) as lifetime_spend from users u left join orders o on u.id = o.user_id where u.status = 'active' and u.created_at >= '2026-01-01' group by u.id, u.email having count(o.id) > 5 order by lifetime_spend desc limit 50

Query Performance & Readability Invariant

SQL formatting improves code review clarity and helps detect missing join criteria (accidental Cartesian products) before deploying migrations.

Relational Algebra Formalisms & SQL Query Transformation Math

SQL declarative statements correspond to relational algebra operators executed across database relations:

1. Relational Projection & Selection Mapping
π_{id, email, amount} ( σ_{status = 'active'} (Users ⋈ Orders) )
2. Clause Formatting Token Invariant
Clause(T) = \n ∥ UPPER(K) ∥ \n \quad ∥ Indent(Attributes)
Step-by-Step SQL Parse & Indentation Breakdown
Step 1: Lexical Normalization & Whitespace Stripping
Collapse redundant space tokens: select * from users
Step 2: Major Clause Boundary Line Break Insertion
Inject breaks before SELECT, FROM, WHERE, GROUP BY, ORDER BY, LIMIT.
Step 3: Column Parameter Indentation
Result=Clean, Deterministic ANSI SQL Structure

SQL Major Clauses & Execution Order Reference

OrderClauseAlgebraic PurposeOptimization Tip
1FROM / JOINIdentifies source tables & cross productsJoin on indexed foreign keys
2WHERERow filtering (Selection σ)Filter early to minimize joined dataset
3GROUP BYAggregates rows into bucketsGroup by unique clustered indices
4HAVINGFilters aggregated group recordsAvoid non-aggregated conditions in HAVING
5SELECTComputes column projection (π)Avoid SELECT * in production endpoints

Frequently Asked Questions

Does this formatter execute or transmit my SQL database queries?
No. All parsing, indentation, casing transformations, and minification are executed 100% locally in your client browser. No SQL text is ever transmitted to a server.
Which SQL dialects are supported?
The formatter supports standard ANSI SQL, PostgreSQL, MySQL, SQLite, Oracle, Snowflake, Microsoft SQL Server (T-SQL), and Google BigQuery syntax.
What is the difference between formatted and minified SQL?
Formatted SQL arranges clauses on separate lines with indented columns for human code reviews and debugging. Minified SQL collapses all unnecessary whitespace into a compact single line, optimal for application string embedding and HTTP request payloads.

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