Advanced SQL Query Optimization is a database engineering product available on the Whop marketplace, created by kuoloyoo and launched in May 2026.

A comprehensive, hands-on course designed for developers who want to eliminate slow queries, reduce database load, and build systems that scale. You'll go beyond surface-level tips and learn the internals of how SQL engines parse, plan, and execute your queries — then use that knowledge to write dramatically faster SQL. What you'll master: • Reading and interpreting EXPLAIN/ANALYZE output like a pro • Index design strategies — B-tree, composite, partial, covering, and expression indexes • Join optimization patterns — nested loops, hash joins, merge joins, and when each wins • Subquery refactoring — transforming correlated subqueries into high-performance joins and CTEs • Window function performance tuning and partition pruning • Write-path optimization — batch inserts, UPSERT patterns, and lock contention reduction • Real-world query rewrites with before/after benchmarks • Connection pooling, query caching, and prepared statement strategies for Node.js Built by a Node.js developer who has optimized production databases handling millions of queries per day. Every lesson includes real SQL you can run, benchmark, and adapt to your own stack.

Advanced SQL Query Optimization has is priced at $219/week.

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