SQL Formatter

Format, minify, and lint SQL with zero dependencies.

Commands

All commands use scripts/sql_format.py.

Format SQL

python3 scripts/sql_format.py format --sql "SELECT id, name FROM users WHERE active = true"
python3 scripts/sql_format.py format --input query.sql
python3 scripts/sql_format.py format --input query.sql --output formatted.sql
python3 scripts/sql_format.py format --input query.sql --indent 4 --lowercase
echo "SELECT * FROM t" | python3 scripts/sql_format.py format --input -

Adds line breaks before major clauses (SELECT, FROM, WHERE, JOIN, ORDER BY, etc.), indents AND/OR/ON, and uppercases keywords by default.

Minify SQL

python3 scripts/sql_format.py minify --sql "SELECT  id,  name  FROM  users  -- comment"
python3 scripts/sql_format.py minify --input query.sql

Strips comments, collapses whitespace, removes unnecessary spaces around parentheses and commas.

Lint SQL

python3 scripts/sql_format.py lint --input query.sql
python3 scripts/sql_format.py lint --sql "SELECT * FROM users WHERE 1=1" --json

Checks for: SELECT *, multiple spaces, tabs, != vs <>, double commas, WHERE 1=1, long lines (>120 chars), trailing whitespace, missing semicolons, inconsistent keyword casing.

Supported SQL

Handles SELECT, INSERT, UPDATE, DELETE, CREATE, ALTER, DROP, WITH (CTEs), JOINs (all types), subqueries, string literals, double-quoted identifiers, single-line and multi-line comments.