SQL query optimization patterns including EXPLAIN plan analysis, index strategies, query rewriting, and N+1 query prevention. Use when optimizing slow database queries, analyzing query performance, designing indexes, or debugging database bottlenecks. Works with PostgreSQL, MySQL, SQLite, and other SQL databases. Typical improvements: 10x-1000x query speedup.
Install
npx skills add stefan-jansen/claude-code-toolkit --skill sql-optimizationnpx skills add stefan-jansen/claude-code-toolkit --skill sql-optimization -a claude-code -gnpx skills add stefan-jansen/claude-code-toolkit --skill sql-optimization -a codex -ggemini skills install https://github.com/stefan-jansen/claude-code-toolkit.git --path skills/general-dev/sql-optimizationgh skill install stefan-jansen/claude-code-toolkit sql-optimizationgit clone --depth 1 https://github.com/stefan-jansen/claude-code-toolkit /tmp/stefan-jansen__claude-code-toolkit
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/stefan-jansen__claude-code-toolkit/skills/general-dev/sql-optimization ~/.claude/skills/sql-optimization # Claude Code
cp -R /tmp/stefan-jansen__claude-code-toolkit/skills/general-dev/sql-optimization ~/.agents/skills/sql-optimization # Codex, Cursor, Gemini CLI, Copilot, OpenCode