Understand JSONB: Binary JSON storage (2-3x faster than MySQL JSON), indexable with GIN indexes, operators for querying nested data

Master Arrays: Native array support (no need for junction tables), array operators (contains, overlaps), GIN indexes for fast array queries

Learn MVCC: Multi-Version Concurrency Control (non-blocking reads during writes), how it works (row versioning), why Instagram chose PostgreSQL

Master Full-Text Search: Built-in full-text search (no need for Elasticsearch for simple cases), tsvector/tsquery, GIN indexes, ranking

Understand Advanced Features: Window functions, CTEs (WITH), RETURNING clause, LISTEN/NOTIFY, table inheritance, custom types

Learn Extensions: PostGIS (geographic data), pg_trgm (fuzzy search), pgcrypto (encryption), uuid-ossp (UUIDs), how to create custom extensions

Understand JSONB: Binary JSON storage (2-3x faster than MySQL JSON), indexable with GIN indexes, operators for querying nested data

Master Arrays: Native array support (no need for junction tables), array operators (contains, overlaps), GIN indexes for fast array queries

Learn MVCC: Multi-Version Concurrency Control (non-blocking reads during writes), how it works (row versioning), why Instagram chose PostgreSQL

Master Full-Text Search: Built-in full-text search (no need for Elasticsearch for simple cases), tsvector/tsquery, GIN indexes, ranking

Understand Advanced Features: Window functions, CTEs (WITH), RETURNING clause, LISTEN/NOTIFY, table inheritance, custom types

Learn Extensions: PostGIS (geographic data), pg_trgm (fuzzy search), pgcrypto (encryption), uuid-ossp (UUIDs), how to create custom extensions