What is a SQL optimizer?

A SQL optimizer improves query efficiency with rewrites that reduce execution time, scan cost, and resource usage. SQLAI.ai shows clear before-and-after changes.

Who is this SQL optimizer intended for?

It is intended for developers, analytics engineers, data analysts, and DBAs improving SQL performance for applications, analytics pipelines, and reporting.

What are common SQL performance use cases?

Common use cases include fixing slow dashboard queries, tuning recurring ETL workloads, reducing API query latency, and cleaning up legacy SQL for better performance.

Do I need to connect my database schema first?

You can optimize queries without connecting first, but schema context improves recommendation quality because SQLAI.ai can align suggestions to real tables and columns.

How can I get better SQL optimizer results?

Share the full query, include the SQL dialect, describe the issue, and provide schema context when possible. Then validate syntax and run the optimized query.

Can I review examples before trying it?

Yes. You can explore optimizer examples to see typical slow-query scenarios and how SQLAI.ai rewrites them for better SQL performance.

#1 SQL optimizer

Optimize SQL Queries for Faster SQL Performance

Improve slow queries with practical rewrite suggestions, clear before/after diffs, and schema-aware guidance. Built for developers, analysts, analytics engineers, and DBAs.

Rewrite slow SQL with AI-powered optimization suggestions
Review every change with side-by-side SQL diff
Ship SQL performance improvements with higher confidence

Try SQL Optimizer Free

Features

How SQLAI.ai improves SQL performance

This SQL optimizer page is intended for teams that need faster queries without sacrificing correctness. Start with a slow query, apply suggestions, then validate and run improvements.

Tune Query Performance
Get a fully performance-optimized SQL query
SQLAI.ai analyzes your query for your selected SQL dialect and returns a rewritten version focused on faster execution and lower resource usage.
- Receive a complete optimized SQL rewrite you can review and run
- Designed for practical performance improvements in real workloads
Optimize a query
Verified Optimizations
See why each SQL optimization was applied
Every suggested optimization is explained with clear reasoning, so you can understand what changed and why it should improve performance.
- Build confidence before running optimized SQL in production
- Keep optimization decisions auditable for your team
Review optimizer output See optimization examples
Optimal Database Indexes
Get index recommendations for optimized SQL
SQLAI.ai suggests practical indexes for the optimized query and provides SQL statements you can use to apply those indexes.
- Identify indexing opportunities tied to query filters and joins
- Receive actionable SQL for implementing recommended indexes
Get index suggestions
Go Even Further
Get additional considerations and optimization notes
Beyond the rewritten query, SQLAI.ai provides extra considerations and tuning notes so you can evaluate edge cases and next-step improvements.
- Surface follow-up opportunities for further SQL tuning
- Capture practical notes for team handoff and review
View advanced notes
Query Diff
Compare exact changes with side-by-side SQL diff
Compare the original and optimized SQL side by side to see every exact change. This keeps optimization transparent and easy to validate.
- Understand exactly what AI changed before deployment
- Validate diff output quickly with your team
Compare query changes
Intended Users and Use Cases
Built for teams that tune SQL performance every day
SQLAI.ai SQL optimizer is intended for backend developers, analytics engineers, data analysts, and DBAs who need faster dashboards and lower warehouse cost.
- Optimize API and app queries with high latency
- Improve reporting and BI dashboard query speed
- Reduce expensive warehouse queries in recurring workloads
View optimizer use cases Start optimizing now

Need full query quality control? Use SQLAI.ai to optimize SQL performance, validate syntax, format for readability, and explain query logic in one place.

Customer teams

Trusted by more than 150,000 professionals

From fast-growing startups to global enterprises, teams rely on SQLAI to ship clear, production-ready queries faster.

Optimize SQL performance across your database stack

SQLAI.ai SQL optimizer supports major SQL and analytics engines, including PostgreSQL, MySQL, SQL Server, BigQuery, and Snowflake.

See all supported databases

FAQ

SQL optimizer FAQ

Quick answers for teams evaluating how SQLAI.ai helps improve SQL performance with practical optimizer workflows.

Optimize SQL Queries for Faster SQL Performance

Improve slow queries with practical rewrite suggestions, clear before/after diffs, and schema-aware guidance. Built for developers, analysts, analytics engineers, and DBAs.

Get a fully performance-optimized SQL query

See why each SQL optimization was applied

Get index recommendations for optimized SQL

Get additional considerations and optimization notes

Compare exact changes with side-by-side SQL diff

Built for teams that tune SQL performance every day