SQL Foundations

Learn SQL through story-driven investigations with progressive practice.

5 Chapters

Practice SQL Daily

Get one SQL challenge every day at your chosen time.

01

Introduction to Databases

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Understand tables, rows, columns, and how relational data is organized.

Course - Chapter 1 - Lesson Set - Exercises
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02

Joins and Aggregations

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Connect tables and compute summaries with JOIN and GROUP BY.

Course - Chapter 2 - Lesson Set - Exercises
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03

SQL SELECT Statement

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Learn how to retrieve data from a database using the SQL SELECT statement. This chapter introduces the core syntax of SELECT, how to choose specific columns, and how to query all data from a table.

Course - Chapter 3 - Lesson Set - Exercises
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04

Introduction to Databases

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Learn what databases are, how tables store data, and how SQL is used to retrieve information. By the end of this chapter, you will understand rows, columns, tables, and run your first SQL query using SELECT.

Course - Chapter 4 - Lesson Set - Exercises
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05

Filtering Data with WHERE

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Learn how to filter rows in a table using the WHERE clause. By the end of this chapter, you will be able to retrieve specific records based on conditions such as equality, comparisons, and logical operators.

Course - Chapter 5 - Lesson Set - Exercises
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