Review first. Measure next.
A practical SQL
review checklist.
Spot review opportunities and inspect PostgreSQL row estimates. Everything stays in this browser. No database connection and no SQL execution.
1. Review your query
Eight static checks for common SQL patterns. Heuristics support PostgreSQL, SQL Server and MySQL-style syntax; this is not a full dialect parser. Maximum 250,000 characters.
2. Optional PostgreSQL JSON plan
Paste an existing EXPLAIN (FORMAT JSON) or EXPLAIN ANALYZE JSON plan. The tool never runs it. EXPLAIN ANALYZE runs the query in your database, so collect plans only in an appropriate environment.
3. Your review
These are review prompts, not proven fixes. No findings does not mean safe, correct or optimal SQL. Check semantics, real execution plans, representative data and index write costs before changing anything.