Master PostgreSQL Through Real Examples
From basic queries to advanced SQL — learn everything you need with hands-on, practical exercises using real-world data.
Free to register. Videos, quizzes & exercises included.
psql — academy database
50+
Hands-On Exercises98+
Video Lectures3h 22m
Total Content300+
Quiz QuestionsNot Just SQL — You'll Think Like a Better Engineer
Mastering the database layer changes how you design systems, write code, and make architecture decisions. These are skills that compound across your entire career.
Think in Systems
Understanding how queries execute — scans, joins, sort orders — trains you to reason about data flow the same way you'd think through a distributed system.
Design Better Schemas
Learn to model data the way production engineers do: normalization, constraints, foreign keys, and trade-offs that hold up at scale.
Write More Efficient Code
Knowing what happens at the DB layer lets you write application code that's faster — fewer round-trips, smarter queries, no N+1 surprises.
Level Up as an Architect
Advanced SQL patterns — window functions, CTEs, recursive queries — mirror the same thinking used in data pipeline and system architecture design.
Avoid Production Mistakes
Understand indexes, locking behavior, and query cost before they become incidents. The engineers who prevent fires know the database.
Speak the Full Stack
From schema to API to UI — fluency at every layer makes you the engineer teams rely on to make confident, data-aware technical decisions.
Ace Your Technical SQL Interviews
SQL shows up in virtually every backend, data engineering, and software engineering interview. This course teaches exactly the topics interviewers ask — so you walk in prepared, not guessing.
Window functions (ROW_NUMBER, RANK, LAG, LEAD)
Complex JOINs, subqueries & CTEs
Query optimization & EXPLAIN plans
Indexing strategies & performance tuning
Aggregations, GROUP BY & HAVING
“Find all employees who earn more than the average salary in their own department.”
SELECT employee_id, name, salary FROM employees WHERE salary > ( SELECT AVG(salary) FROM employees e2 WHERE e2.dept_id = employees.dept_id );
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 DB30+
Years of DevelopmentOpen
Source & FreeHigh 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.
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
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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
Software Architect
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+
Projects15+
IndustriesAsk Questions, Get Real Answers
Stuck on a concept or query? You don't have to figure it out alone — message the instructor directly or post a question and get a real answer.
Direct Chat
Message the instructor directly as you work through the course and get a real reply.
Q&A
Post questions tied to lectures and exercises. Browse answers from previous students or get a fresh reply.
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.”
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.”
Kristina 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.”
Priya Patel
CS Student, University of Toronto