Trade

Indexing Strategies

Practical guidance for deciding what to index, how to order multicolumn indexes, and how to validate index effectiveness in PostgreSQL.

Embedding vs Referencing

Understand the core MongoDB modeling trade-off between embedding related data inside a document and referencing it via a separate collection.

Database Indexing Strategies Cheat Sheet

Index types, composite column ordering, query plan reading, and common anti-patterns for tuning read performance across relational databases.