database-query-optimization

Database Query Optimization

Table of Contents

• Overview
• When to Use
• Quick Start
• Reference Guides
• Best Practices

Overview

Slow database queries are a common performance bottleneck. Optimization through indexing, efficient queries, and caching dramatically improves application performance.

When to Use

• Slow response times
• High database CPU usage
• Performance regression
• New feature deployment
• Regular maintenance

Quick Start

Minimal working example:

-- Analyze query performance
 
EXPLAIN ANALYZE
SELECT users.id, users.name, COUNT(

Reference Guides

Detailed implementations in the references/ directory:

Best Practices

✅ DO

• Follow established patterns and conventions
• Write clean, maintainable code
• Add appropriate documentation
• Test thoroughly before deploying

❌ DON'T

• Skip testing or validation
• Ignore error handling
• Hard-code configuration values