Daily Tip: Optimizing Database Queries

Today's quick tip focuses on optimizing database queries for better performance.

Key Optimization Techniques

1. Use Indexes Wisely

Always ensure your frequently queried columns have proper indexes. However, avoid over-indexing as it can slow down write operations.

2. Limit Results

Use LIMIT clauses to restrict the number of rows returned, especially for pagination:

SELECT * FROM users ORDER BY created_at DESC LIMIT 20;

3. Avoid SELECT *

Only select the columns you actually need:

-- Instead of
SELECT * FROM products;

-- Use
SELECT id, name, price FROM products;

4. Use Prepared Statements

Prepared statements not only prevent SQL injection but also improve performance through query caching.

Quick Wins

• Add indexes to foreign keys
• Use EXPLAIN to analyze query plans
• Monitor slow query logs regularly
• Consider connection pooling

Stay tuned for more daily tips!