SQL courses

Start here if you’re new to SQL. Learn the basics of SQL, retrieve data from an SQL database and build simple reports.

Learn how to use analytic SQL functions to deeply understand data.

Review and deepen your knowledge of SQL JOINs with 93 exercises. Practice common and less common ways of getting data from...

Master the most challenging type of SQL queries. Learn how to process trees and graphs in SQL, and how to effectively organize...

Refine your SQL skills with 88 interactive exercises, ranging from simple tasks with SELECT FROM statements to more...

Enhance your SQL skills through self-guided exploration of real-world datasets. Get hands-on experience in data analysis...

Looking for SQL practice exercises for beginners? This course is for you! Here are 156 interactive online exercises to refresh...

Do you want to practice SQL? Are you looking for problems to help you practice what you've learned? You've come to the right...

Master SQL with blog and web traffic data for a dog supply store. Dive into data analysis with these 141 interactive...

Do you like both sports competition and learning? We have something for you. Here are 119 interactive online SQL exercises to...

Do you want to practice SQL window functions? You've come to the right place! Here are 100 interactive online exercises on...

Practice SQL queries with all basic coding challenges from 2023!

Practice SQL queries with all advanced coding challenges from 2023!

Do you want to work with data using the most popular database in the world? Learn the basics of MySQL with these 126...

Start here if you're new to SQL Server. Learn the basics of T-SQL for SQL Server, retrieve data from an SQL Server database...

Gaining insight from collected data plays an important role in today's information-driven world. During this online course,...

Learn how to work with maps in SQL

Go beyond simple SELECT statements! Learn all about the SQL UPDATE, INSERT, and DELETE commands, and find out how to combine...

Teach yourself how to build basic SQL reports to track and analyze the performance of your metrics.

Learn how to process numerical, text, and other types of data with SQL’s most-used functions.

Learn how to perform SQL trend analyses using SQL and build a meaningful revenue report from scratch.

Learn how to do customer behavior analysis in SQL and analyze the customer lifecycle.

Do you want to work more efficiently using SQL and be able to create more complex and sophisticated queries? Learn about GROUP...

Do you want to practice your MySQL skills? Here are 88 interactive SQL exercises that will test your knowledge. Start with...

Would you like to work with data from multiple tables? Or do you need to practice MySQL JOINs? We’ve prepared 92 exercises to...

Want to stay up to date with the latest MySQL features? MySQL window functions are essential for doing modern data analysis....

Do you want to be able to process trees and graphs in MySQL? Are you using MySQL 8 or higher? Learn how to write recursive...

Learn how to build MySQL reports that track and analyze key performance metrics with this interactive course.

Learn how to use the most common MySQL 5 and MySQL 8 functions. You’ll be writing MySQL queries like a pro!

Have you already learned the basics of SQL? Now it's time for the next step: adding, changing, and removing data in MySQL using...

Do you want to perform multiple groupings in one query? Learn how to use GROUP BY extensions, such as ROLLUP in MySQL. Take...

Refine your SQL Server skills with 88 interactive exercises, ranging from simple tasks with SELECT and FROM statements to...

Review and deepen your knowledge of T-SQL JOINS with this set of 93 great, interactive exercises. Practice the most popular...

Learn how to use analytic T-SQL functions to deeply understand data.

Master the most challenging type of T-SQL queries. Learn how to process trees and graphs in T-SQL, and how to effectively...

Learn how to build basic SQL reports and make more informed, strategic decisions.

Learn how to perform trend analysis in SQL Server, and create a meaningful revenue report from square one.

Learn how to conduct an analysis of customer behavior for your business using T-SQL queries. In this online course, you'll find...

Learn how to use common T-SQL functions to process various types of data with ease. Soon, you’ll be able to modify textual...

Discover SQL Server data manipulation language (DML) processes. Learn how to insert, update, and delete data from a database.

Learn how to use ROLLUP, CUBE, and GROUPING SETS—three extremely useful GROUP BY extensions that will help you create...

This online practice set consists of 88 interactive exercises. You will practice using simple statements and clauses, like...

Consolidate your knowledge of operating on two or more data tables in PostgreSQL database. This online practice set consists of...

A window function is an advanced SQL concept that enables you to maximize efficiency and minimize the complexity of queries...

In this online course, you will master PostgreSQL recursive queries, also known as WITH clauses, and common table expressions (CTEs).

Gain competitive skills in SQL by learning how to create SQL reports in the PostgreSQL database! This online course consists of...

Learn how to do customer behavior analysis in PostgreSQL and analyze the customer lifecycle.

Learn how to analyze revenue trends and create reports using PostgreSQL. Discover how to build meaningful revenue reports and...

Learn how to use common PostgreSQL functions to process various types of data with ease. Soon, you'll be able to modify...

A data manipulation language (DML) helps you retrieve, store, modify, and delete data in a database. In this online course,...

Would you like to work smoothly and efficiently in PostgreSQL? Do you want to be able to create more complex queries? You...

Take your PostgreSQL skills to the next level by learning how to write your own functions.

Discover the basic building blocks of creating tables in MySQL, SQL Server, Oracle, and PostgreSQL. Learn all about primary...

Constraints tell the database how to check the correctness of input data. Get to know the constraints available in SQL...

Choose the right type of data for your needs. A data type tells the database what kind of information a column will store....

Query more effectively with SQL views! A view is a saved SQL query. Learn how to create, modify, and remove views in SQL...

To be a database professional, you must understand how indexes work. These structures help the database to execute SQL...

Practice SQL queries with all coding challenges from 2020!

Practice SQL queries with all basic coding challenges from 2021!

Practice SQL queries with all advanced coding challenges from 2021!

Practice SQL queries with all basic coding challenges from 2022!

Practice SQL queries with all advanced coding challenges from 2022!

Learn how to do customer behavior analysis in MySQL and analyze the customer lifecycle.

Help Elisabeth run her music club while practising SQL! Find out how many events were held last year, discover which concerts...

Our company headquarters has been haunted by monsters. Use SQL to find the scariest one that took your promo code!

Learn and practice SQL subqueries with over 70 exercises across 6 datasets. Perfect for beginners and those looking to...

Practice SQL queries with all basic coding challenges from 2024!

Practice SQL queries with all advanced coding challenges from 2024!

Check out this month's basic challenge and help Paige Turner manage her book club!

Check out this month's advanced challenge and help Nolan Roots manage his landscaping business!

Want to learn and practice SQL GROUP BY? This course gives you 120+ hands-on exercises with real-world datasets, so you...

Check out the March advanced challenge and help Megan prepare reports for her local theater.

Olivia is the owner of a hair salon. She wants to better understand her clients and their needs. Can you help her gather...

Check out this month's advanced challenge. Help Sven manage the services of his telecommunications company!

Check out this month's basic challenge and help Arthur Hart manage his clinic’s operations!

Practice SQL recursive queries and help Tiffany manage her online course website.

Help Damiano manage his car rental business by uncovering key insights with SQL. Find top customers, popular cars, and price ranges!

Help Ruby grow her language tandem app by uncovering insights with SQL. Find where Spanish speakers live, track active chat...

Help Anna grow her private airline by uncovering insights with SQL. Analyze flight profits, unused routes, and travel...

Help Kate expand her electronics store while practising SQL functions. Calculate average purchases per customer, apply loyalty...

Help Daisy analyze her jewelry store’s sales while practising SQL! Find out how many purchases each customer made and how much...

Help Lucas build a new social hub for gamers while practising SQL! Discover the average ratings of featured games, analyze how...