Course of the Month

Jakub Romanowski

Free Course of the Month – GROUP BY Extensions in PostgreSQL

Do you work with data? Want to be able to create better and more sophisticated SQL reports? Then check out our interactive GROUP BY Extensions in PostgreSQL course. In May 2023, you can complete this online PostgreSQL course for FREE! How can you get this free SQL course in May 2023? Create a free LearnSQL.com account or log in if you already have one. Start the course.

Jakub Romanowski

Free SQL Course of the Month – Creating Basic SQL Reports in PostgreSQL

If you are looking for a course that takes your PostgreSQL skills to a completely different level, you've come to the right place. You can learn for free in April! We chose SQL Reporting in PostgreSQL for our Free SQL Course of the Month. It's just awesome – I'll tell you why. Do you want to be even better at SQL? Do you know the basics and want your SQL reports to be even more sophisticated?

Jakub Romanowski

Free Course of the Month – PostgreSQL JOINs

Our PostgreSQL JOINs course will help you consolidate your knowledge of working with data from two or more tables in a PostgreSQL database. Throughout the month of February 2023, this awesome SQL course is absolutely FREE! Wondering why we want to give you this SQL course for free? We've been doing this for a long time. Every month, we choose one of our interactive online SQL courses and give users free access to it.

Jakub Romanowski

Free SQL Course of the Month – Window Functions in PostgreSQL

Are you looking for the best way to master SQL window functions? In this article, I'll show you how you can do so for free. Throughout January 2023, you can access the interactive course Window Functions in PostgreSQL for free. Hurry, time is running out! Need a free PostgreSQL course on window functions? You've come to the right place! If you are reading this article, you probably know PostgreSQL is one of the most popular databases in the world.

Jakub Romanowski

Free Course of the Month – Common Functions in PostgreSQL

Do you want to be able to use popular PostgreSQL functions and process different types of data more easily? You've come to the right place! Here is the Common Functions in PostgreSQL course. Throughout the month of December 2022, this SQL course is absolutely FREE! You are probably wondering why LearnSQL.com is offering a free SQL course. Well, we've been doing this for a long time. We choose one of our courses every month and give users free access to it.

Jakub Romanowski

Free Course of the Month – Writing User-Defined Functions in PostgreSQL

Why learn to write user-defined functions? I’ll explain in this article – and how you can learn for free during July 2022 with this LearnSQL.com  PostgreSQL course! PostgreSQL is one of the most popular databases in the world. This is mainly due to its great functionality and the fact that it’s open source (i.e. free!). Postgres is fast, it runs on multiple systems, and it’s suitable for almost any application.

Jakub Romanowski

SQL Track of the Season: SQL from A to Z in MySQL

Do you feel the spring already? Everything is in full bloom at this time of the year. Why shouldn’t it be the same with your career? You just need to water it with a new skill. Here is the brilliant SQL from A to Z in MySQL track, our Track of the Season. In this article, I answer common questions about this awesome set of online MySQL courses. Why should you care about relational databases at all?

Jakub Romanowski

Free SQL Course of the Month – Window Functions in PostgreSQL

This is what distinguishes ordinary SQL users from professionals – SQL window functions! Would you like to practice them in PostgreSQL, on one of the best interactive SQL courses in the world, and pay nothing for it? Throughout November, you have access to the Window Functions in PostgreSQL course for FREE. You read it right: you won't pay a penny! What's the catch? Why would someone give you a free course?

LearnSQL.com Team

Free Course of The Month – SQL Practice Set in MS SQL Server

You have to train a lot to learn a new skill. It is the same with MS SQL Server. Do you want to write good SQL queries? Or maybe you are preparing for a job interview? You've come to the right place! Throughout October you will have access to our amazing hands-on MS SQL Server course for FREE! You probably just thought: “There must be a catch. Why would someone give away SQL courses for free?

Jakub Romanowski

Free Course of The Month – Revenue Trend Analysis in SQL Server

It is impossible to run a business without a good analysis of revenue trends. But how do you do it effectively? You can rely on good old Excel, but a much better idea is to use SQL and databases. Learn how to create SQL reports and track the growth of your business with MS SQL Server. Here is the course, Revenue Trend Analysis in SQL Server. It’s FREE throughout September!

Jakub Romanowski

Free SQL Course of the Month – Creating Basic SQL Reports in SQL Server

This is another in our series of free SQL Courses of the Month. This time, you can learn SQL Reporting in MS SQL Server for free. Do you want to be able to prepare even better SQL reports? Or maybe you have some basic knowledge of SQL Server (one of the major SQL dialects) and would like to go a step further? This is the course for you.

Jakub Romanowski

Free Course of the Month – GROUP BY Extensions in MS SQL Server

Do you create SQL reports? Do you want them to be even better and more effective? Are you working with MS SQL Server and want to expand your query writing skills? Here is a great, interactive GROUP BY Extensions in MS SQL Server course. For the month of June, you can learn and finish this course for absolutely free. How can you get this free SQL course in June?

LearnSQL.com Team

SQL Course of the Month – SQL Practice Set

Are you starting your adventure with SQL and looking for a place to practice your SQL queries? Or maybe you are preparing for a job interview? I have good news for you. Throughout May, you will have access to our amazing SQL practice course for FREE! Why is LearnSQL.com giving you a free SQL course? Every month, our users get the opportunity to take one of our great SQL courses for free.

Jakub Romanowski

Free SQL Course of the Month – Creating Basic SQL Reports

Do you want to create good SQL reports from scratch? Are you looking for a course that will help you spread your analytical wings? What if I told you that throughout April 2021, you could access one of the best SQL Reports courses for FREE? Here it is: Creating Basic SQL Reports. What's the catch? There is none. LearnSQL.com provides one of their courses for free from time to time.

LearnSQL.com Team

Free SQL Course of the Month – Window Functions

Are you looking for a good SQL window functions course? What if I told you that throughout March, you could access the best window functions course in the world for absolutely FREE? You read that right: you won't pay a dime! Hurry up! Time is running out! But wait – why is LearnSQL.com giving you a free SQL course? Well, we believe sometimes you just have to be good to others.

LearnSQL.com Team

SQL Course of the Month – SQL JOINs

If you want to really learn SQL, you can’t skip SQL JOINs. They are some of the most fundamental and commonly used features of the SQL language. That’s why SQL JOINs is our February SQL Course of the Month. What makes SQL JOINs so important? I asked Agnieszka Kozubek-Krycuń, Vertabelo's Chief Content Officer, about it. Here's what she said. Is it true that SQL JOINs are one of the foundations of SQL?

LearnSQL.com Team

SQL Course of the Month – Standard SQL Functions

Are you dreaming of becoming a data analyst? Or maybe you just want to work effectively with your company’s databases? You can – with SQL functions. We’ve selected Standard SQL Functions to be our January 2021 SQL Course of the Month. What will you find inside? I asked Agnieszka Kozubek-Krycuń, Vertabelo's Chief Content Officer, about it. Here's what she said. What are SQL functions? The term reminds me of SELECT or JOIN.

LearnSQL.com Team

SQL Course of the Month – Customer Behavior Analysis in SQL

Do you run a business? Do you want to squeeze even more out of your data? Start by analyzing your customers' behavior using SQL! Throughout December, you can learn how to do it for free on LearnSQL.com! I asked Agnieszka Kozubek-Krycuń, Vertabelo's Chief Content Officer, about our December Course of the Month, Customer Behavior Analysis in SQL. Here's what she told me. Let's start with the basics: Why analyze customer behavior?

LearnSQL.com Team

SQL Course of the Month – GROUP BY Extensions in SQL

Do you want to develop your SQL skills? Do you want to get more out of your data and prepare better reports and summaries? The answer is learning to use SQL’s GROUP BY extensions. But how should you go about this? I asked the same question to Agnieszka Kozubek-Krycuń, Vertabelo’s Chief Content Officer. As she explains, the secret is in this November’s free SQL Course of the Month: GROUP BY Extensions in SQL.

LearnSQL.com Team

SQL Course of the Month – How to INSERT, UPDATE, and DELETE Data in SQL

So, you've started learning SQL, and you already know what the SELECT command is and when to use it! Congratulations! Now, it's time to take the next step towards becoming an expert. You need to know the SQL UPDATE, INSERT, and DELETE commands to modify data in your tables. These are the basics that will allow you to work with tables. But what's the best way to learn them? I asked Agnieszka Kozubek-Krycuń, Chief Content Officer at Vertabelo.

LearnSQL.com Team

SQL Course of the Month – Analyzing Revenue Trends in SQL

We work hard, we learn SQL, and we develop professionally. But why? For our own satisfaction, but also for money! The knowledge of SQL will increase your income significantly. If you are proficient in SQL, you can better analyze your company's revenue. How? I asked Agnieszka Kozubek-Krycuń, Chief Content Officer at Vertabelo. In this article, she answers your questions about our September SQL Course of the Month: Analyzing Revenue Trends in SQL.

LearnSQL.com Team

SQL Course of the Month – Recursive Queries

Recursive Queries is one of SQL’s more advanced features. You could say they divide SQL users into beginners and experts. But how do you learn recursive queries? And why do you need them, anyway? Agnieszka Kozubek-Krycuń, Chief Content Officer at Vertabelo, is here to help. In this article, she answers your questions about our August SQL Course of the Month: Recursive Queries. Recursive queries … that sounds very serious.

Jakub Romanowski

SQL Course of the Month – PostGIS

It's summer, and it's travel time ... at least it would be under normal conditions. The pandemic is still going on, but that doesn't stop us from dreaming about distant trips and visits to beautiful places. For now, most of us will have to do it on a map. Did you know that databases can store geographical data? With interactive maps, if you find a nice summer house on the internet, you can accurately track it and plan the best route there.

LearnSQL.com Team

SQL Course of the Month – SQL Practice Set

It is said that practice makes perfect. I agree with this statement one hundred percent. What is applicable in basketball training, playing an instrument, or learning a foreign language is also useful in learning SQL. Practicing writing queries, using functions, and putting together clauses is the basis for learning the true power of SQL. But how and where do you practice SQL? I spoke with Agnieszka Kozubek-Krycuń, Chief Content Officer at Vertabelo about this.

LearnSQL.com Team

SQL Course of the Month – Creating Basic SQL Reports

In May, we chose Creating Basic SQL Reports as our course of the month. Why? Because the basis of every successful business is making the right decisions based on proven data and good SQL reports. I asked Agnieszka Kozubek-Krycuń, Chief Content Officer at Vertabelo, about this. She knows SQL better than just about anyone and is probably the best person to talk about SQL Reporting. What does it mean to create SQL reports?

LearnSQL.com Team

SQL Course of the Month – Window Functions

Spring has come. It is nicer outside. It's a great time to learn something new. Which course should you choose? In April, it's worth it to bet on SQL window functions. What are they, what are they used for, and why are they worth knowing? I asked Agnieszka Kozubek-Krycuń, Chief Content Officer at Vertabelo, these questions. She has a PhD in mathematics and over 10 years’ experience teaching mathematics and computer science at the University of Warsaw.