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Learn SQL by Doing

Master PostgreSQL Through Real Examples

From basic queries to advanced SQL — learn everything you need with hands-on, practical exercises using real-world data.

One-time payment. Lifetime access. No subscription.

PostgreSQL

psql — academy database

SELECT architect, project FROM academy
WHERE skills @> '{"expert": true}';
-- Result: Knowledge unlocked.
100+
Hands-On Exercises
98+
Video Lectures
3h 22m
Total Content
300+
Quiz Questions

The World's Most Advanced Open Source Database

PostgreSQL powers some of the most demanding applications on the planet — from startups to Fortune 500 companies. Learning it isn't just a skill, it's a career investment that pays off across every role in tech.

#1
Most Loved DB
35+
Years of Development
Open
Source & Free

High Demand, Higher Salaries

PostgreSQL is one of the most in-demand database skills. Engineers who know it command higher salaries and more job opportunities.

Handles Any Workload

From relational data to JSON documents, geospatial queries, and full-text search — one database does it all.

Transferable SQL Skills

SQL is universal. Master it in PostgreSQL and you can work with MySQL, SQL Server, or any relational database.

Used Everywhere

Apple, Instagram, Spotify, and NASA all run PostgreSQL. Learning it connects you to real-world production systems.

Course Curriculum

A structured path from SQL foundations to complex systems architecture.

  • Prerequisites

  • Working Data

  • Select

  • Select Multiple

  • Select Constants

  • Order By

  • Limit and Offset

  • Where

  • IS NULL

  • And/Or

  • Not

  • In

  • Between

  • Any/Some

  • Alias

  • Exists

  • Distinct

  • Like

  • Case When

  • Upper

  • Initcap

  • Concat

  • Left

  • Right

  • Substring

  • Length

  • Replace

  • Cast

  • Trim

  • Split Part

  • Introduction

  • Min

  • Max

  • Sum

  • Avg

  • Count

  • Filter

  • Group By

  • Group By Multiple

  • Having

  • Over

  • Union

  • Union All

  • Left Join

  • Inner Join

  • Current

  • At Timezone

  • Extract

  • Date Part

  • Date Trunc

  • Date Difference

  • Age

  • To Char

  • To Date

  • Interval

  • Make Interval

  • Introduction

  • Select Property

  • Select Sub Property

  • Aggregation

  • JSON Build

  • Introduction

  • Unnest

  • Slicing

  • Append

  • Length

  • Search

  • Aggregates

  • String to Array

  • Introduction

  • Partition By

  • Row Number

  • Ntile

  • Introduction

  • Database

  • Tables

  • Columns

  • Default

  • Not Null

  • Unique

  • Check

  • Primary Key

  • Compound Key

  • Foreign Key

  • On Delete

  • Index

  • If Not Exists

  • CRUD

  • Insert Multiple

  • On Conflict

  • Transactions

  • Greatest

  • Subquery

  • Coalesce

  • Except

  • CTE

  • Generate Series

  • Where to Go

Learn by Writing Real Queries

Every section comes with hands-on exercises where you write and run real SQL against a live database. No copy-paste — you solve problems, see results, and build muscle memory.

  • 100+ exercises across all difficulty levels

  • Write queries against real-world data

  • Instant feedback with expected vs actual results

Exercise Preview
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FROM students s
INNER JOIN registrations r
  ON s.id = r.student_id
GROUP BY s.id, s.name
HAVING COUNT(r.course_id) >= 3
ORDER BY courses DESC;

Who This Course Is For

Whether you're just starting out or leveling up — this course meets you where you are.

Software Engineers

Your applications run on a database. Knowing PostgreSQL means you can build reliable, performant systems from the ground up.

Data Scientists

Your data starts in a database. SQL lets you prepare and transform it at the source before it ever reaches your models.

Data Analysts

Your reports come from a database. SQL gives you direct access to the data you need without waiting on anyone else.

Missak Boyajian
Missak Boyajian

Software Architect

YOUR INSTRUCTOR

Passion for PostgreSQL, proven in production

Software engineer with over 10 years of experience building large-scale enterprise applications across Healthcare, Financial Systems, CRM platforms, and Payment Processing. PostgreSQL has been a core part of the systems I've architected — this course shares practical knowledge from real production experience.

10+
Years Exp.
50+
Projects
15+
Industries
Connect

What Students Are Saying

Hear from real students who transformed their SQL skills with this course.

“I went from barely understanding JOINs to writing complex subqueries with confidence. The hands-on exercises made all the difference — I actually retained what I learned instead of forgetting it the next day.”

HB

Hovsep Boyajian

Junior Backend Developer

“Best SQL course I've taken, and I've tried a few. The real-world examples and the way concepts build on each other made everything click. I use what I learned here every single day at work.”

KD

Kristine Demirjian

Data Analyst at Fintech Startup

“This course gave me a massive head start in my database class. The exercises are challenging but fair, and the instructor explains things in a way that just makes sense. Worth every penny.”

PP

Priya Patel

CS Student, University of Toronto

Ready to Master PostgreSQL?

Join thousands of students learning SQL through practical examples