Course of the Month: JOINs in PostgreSQL

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 July 2024, 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. We want to help you develop and become an SQL expert.

For July 2024, we chose PostgreSQL because it is currently one of the most sought-after skills on the market. It is also one of our favorite databases! So why not learn SQL JOINS in PostgreSQL when the course is FREE? You risk nothing, and you can gain a lot!

How can you get this course for FREE in July 2024?

• Create a free LearnSQL.com account or log in if you already have one.
• Start the course. You will have free access to its content until the end of July.

What Are SQL JOINs in PostgreSQL?

JOINs are one of the most important topics in SQL.  Mastering them is the basis for working efficiently with relational databases. It is very rare that we have all the data we need in one table. JOIN lets us combine data from two or more tables. Knowing how to properly use JOINs is essential for anyone who wants to work with SQL.

JOINs in PostgreSQL will let you work with data in two or more tables.

A simple example: You have two tables, one with order data and the other with customer data. Thanks to SQL JOIN, you can create simple reports on which customer bought the most in a given month or which country generates the most orders (and so on).

Many SQL beginners are concerned about SQL JOINs. JOINs are not really difficult, but it’s usually the first SQL feature people encounter that’s a little more complicated. Therefore, it takes a lot of practice to master SQL JOINs. The best way to do this is through hands-on practice with our PostgreSQL JOINs interactive course.

What Will You Learn in This Course?

We created this online SQL exercise set for users who are already familiar with the basics of PostgreSQL queries. Are you looking for a place where you can polish or refresh your knowledge about JOIN clauses? Do you want to practice for an SQL job interview? This is the perfect course for you!

If you have just started to learn SQL or are just thinking about it, take the SQL Basics in PostgreSQL course first. Learn the core commands like SELECT, WHERE, and GROUP BY, then return to this tutorial for hands-on practice. Mastering the fundamentals of PostgreSQL will not take you more than a few days.

SQL Basics in PostgreSQL is also the first step of the SQL Fundamentals in PostgreSQL track. It is a great start to becoming a PostgreSQL expert.

By doing our PostgreSQL course on SQL JOINs, you will learn how to:

• JOIN and SELECT data from two or more data tables.
• JOIN many tables in a single query.
• JOIN a table with itself.
• JOIN tables on non-key columns.
• Quickly determine which type of JOIN you should use to correctly filter your data: LEFT JOIN, RIGHT JOIN, INNER JOIN, or FULL JOIN

This awesome course is packed with information! Take your PostgreSQL skills to the next level!

Are you looking for a new job? Do you dream about a career as an SQL developer, a database administrator, or a data or business analyst? The skills acquired in this course give you a significant advantage at your next interview.

Moreover, most of the topics covered in this PostgreSQL course are not limited to this dialect of SQL. You can successfully apply your new knowledge in other popular databases such as Oracle or MS SQL Server. You can check minor differences in syntax or function names in your database’s documentation.

Why Choose the PostgreSQL JOINs Course?

We know that the most important thing to learn any skill is a lot of practice. However, novice PostgreSQL users often have trouble finding the right tasks and projects for this. Some are too easy and will not help you to move forward; others are too advanced and will reduce your motivation and willingness to learn SQL. In either case, this PostgreSQL JOINs course is the answer!

During this course, you will solve 93 interactive exercises ranging from easy to difficult. They are demanding, but you can do it! If you encounter a problem or get stuck, you can always use the hints in the exercises or write to us and we will help!

Our courses are interactive. Our browser-based console lets you write real SQL queries and see their results right away.

Learning PostgreSQL has never been this easy or realistic! Our exercises are not abstract. They are based on real scenarios; you can easily copy the solutions, adapt them to your data, and apply them in your own projects. And you don't need to install or configure anything on your computer. All you need is internet access and your favorite browser.

Who did we create this course for? For analysts, data engineers, and beginner programmers searching for the best place to practice their PostgreSQL skills. Computer science students will also gain a lot from taking our interactive SQL course.

Master PostgreSQL JOINs and Go Further!

If you are serious about using PostgreSQL, consider taking our SQL from A to Z in PostgreSQL track. You will find everything you need for working with relational databases.

You can go "all in'' and buy the All Forever Plan right away. You get access to all courses on our platform, including those that will be published in the future.

Every journey begins with the first step. Start by mastering PostgreSQL JOINs and get better every day! You can do this course for FREE until the end of January!