Learn PostgreSQL – Second Edition

This repository contains scripts, notes, examples, and exercises from Learn PostgreSQL – Second Edition.
It is designed to help learners understand PostgreSQL from beginner to advanced levels through hands-on practice.

🚀 Overview

PostgreSQL is one of the most powerful and widely used open-source relational databases.
This repository explores:

SQL fundamentals

Data modeling and schema design

Indexing strategies

Query performance optimization

Stored procedures, triggers, and functions

Transactions and concurrency

Database administration

Each chapter folder includes code samples, practice queries, exercises, and real-world database examples.

📁 Repository Structure

(Modify as needed based on your folder layout)

/Chapter-01-SQL-Basics                  # SELECT, WHERE, ORDER BY, JOINS  
/Chapter-02-Database-Design             # Normalization, ERD, schema creation  
/Chapter-03-Indexes-And-Optimization    # Index types, query plans, tuning  
/Chapter-04-Functions-And-Procedures    # PL/pgSQL, functions, stored procedures  
/Chapter-05-Triggers-And-Events         # Event-based workflows  
/Chapter-06-Transactions-And-Locking    # ACID, isolation levels, concurrency  
/Chapter-07-Admin-And-Maintenance       # Backups, monitoring, tuning  
/Chapter-08-Advanced-SQL                # Window functions, CTEs, subqueries  
/datasets                               # Sample datasets  
/scripts                                # SQL files used in examples  
/docs                                   # Notes, diagrams, and references  

🔍 Key Features
✔️ SQL Fundamentals

Basic queries and filtering

JOINs, GROUP BY, HAVING

Subqueries and CTEs

✔️ Advanced SQL

Window functions

Recursive CTEs

Complex aggregations

✔️ Database Design

Schema creation

Normalization

Constraints and relationships

✔️ Performance Optimization

Indexing strategies

Query execution plans (EXPLAIN/ANALYZE)

Database tuning techniques

✔️ PL/pgSQL Programming

Functions and stored procedures

Triggers

Error handling and control structures

✔️ Administration & Maintenance

Backups and restores

Role and permission management

Monitoring and diagnostics

🛠️ Tech Stack

PostgreSQL

PL/pgSQL

psql CLI tools

Optional: pgAdmin, DBeaver, Docker

📘 Use Cases

Learning PostgreSQL from scratch

Strengthening SQL for data engineering & backend development

Preparing for database interviews

Practicing real-world database scenarios

Understanding database performance optimization

🤝 Contributions

Pull requests, improvements, and additional PostgreSQL scripts are welcome!

📄 License

This project is licensed under the MIT License.