#SQL

Beyond basic SELECT: JSONB, CTEs, and Window Functions dramatically expand what you can do in a single SQL query.

Querying related data returns null? Fix common Foreign Key issues in Supabase and master the `select(*, related_table(*))` syntax. Deep dive into Many-to-Many and Inner Joins.

The definitive guide for Architects. Covers Storage Engines, Distributed Systems Theory (CAP, PACELC), Transactions, Sharding, Glossary, and FAQ.

Add one small feature and suddenly your DB CPU hits 100%. The culprit is usually the N+1 problem caused by ORM's Lazy Loading. Here's how to diagnose it, cut 1000 queries down to 1, and avoid the ORM mistakes that cause it.

When Scale-Up fails, Scale-Out is the answer. Vertical vs Horizontal Partitioning, Shard Key selection strategies (Geo vs Hash), and the complexity of Distributed Transactions.

A comprehensive guide to Database Indexing. Understanding the B-Tree structure, the difference between Clustered and Non-Clustered Indexes, and why Hash Indexes are rarely used for range queries. Includes a dedicated section on 'The Index Usage Anti-Patterns'.