title: Database Indexing Test

Optimizing Lookups

Database indexes help the query planner locate rows quickly.

B-Tree Overview

B-Tree indexes are the default structure in most relational databases.

• Balanced tree ensures logarithmic lookups
• Supports range queries efficiently
• Handles inserts with minimal rebalancing

Example Query

SELECT *
FROM users
WHERE email = 'andrew@example.com';

When To Avoid Indexes

Indexes have a cost. They slow down writes and consume disk space.

Consider skipping indexes on columns with high write throughput or very low selectivity.

Read the docs for deeper guidance.