PostgreSQL Tutorial

1. PostgreSQL Introduction

What PostgreSQL is, why teams choose it over MySQL, and connecting via psql.

2. Advanced Data Types

JSONB, arrays, UUID, and range types, with guidance on when JSONB beats a normalized schema.

3. Indexes and Query Planning

B-tree vs GIN vs GiST indexes, reading EXPLAIN ANALYZE, and partial indexes.

4. Transactions and MVCC

PostgreSQL's MVCC model, isolation levels, and why VACUUM exists.

5. Full-Text Search

tsvector and tsquery, indexing search with GIN, plainto_tsquery, and ranking results with ts_rank.

6. PostgreSQL Extensions

What extensions are, CREATE EXTENSION, and using pg_trgm for fuzzy search and uuid-ossp for UUIDs.

7. PostgreSQL Interview Questions

Real PostgreSQL interview questions and answers covering MVCC, JSONB, and indexing.