Index Design

The mental model behind PostgreSQL indexes - what a B-tree actually stores, how the planner decides to use one, and why every index you add is also a maintenance cost you commit to.

Learn to design SQL indexes that accelerate lookups by matching WHERE, JOIN, and ORDER BY clauses in PostgreSQL queries.

Learn how to order columns in a multicolumn index for optimal query performance. Understand left-prefix rules and apply them with a practical SQL example.

Identify and eliminate duplicate and redundant PostgreSQL indexes. Learn how to audit indexes, understand their impact, and use SQL examples.

Learn best practices for PostgreSQL index maintenance, including design gates, operational procedures, and team workflows to optimize performance and reduce bloat.

A single-page roundup of every highlight bullet from the 6 pages in the Index Design section, grouped by source page so you can scan all 36 takeaways without opening each article individually.