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Mastering SQL is a hands-on experience — learning the concepts is one thing, but writing good queries requires practice. Whether you’re a complete beginner, someone who just finished our SQL Basics course, or an SQL enthusiast who’s simply eager to hone their skills, there’s always room for improvement. This practice set tests your basic SQL knowledge and shows you where you need to improve.

The scope of this practice set includes:

  • simple SELECT queries;
  • aggregate functions (COUNT, SUM, AVG);
  • grouping and ordering results;
  • JOINs (querying from multiple tables, self joins, LEFT JOIN, RIGHT JOIN, and non-equi JOINs);
  • subqueries (simple subqueries, subqueries with multiple results, correlated subqueries, and subqueries in the FROM and SELECT clauses).

The last two parts of the course comprise a special challenge that combines all of the above material for a comprehensive review.

What Do You Need To Take This Course?

Just a web browser and an Internet connection

Who Should Take This Course?

  • Analysts who use relational databases
  • Students taking courses in relational databases
  • Beginning programmers interested in SQL
  • Business database users who want to improve their querying skills
  • Anyone who finished the SQL Basics course or has equivalent knowledge
  • Anyone who wants to practice writing SQL queries
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    One to Rule 'Em All

    Includes 30 courses Python Basics. Part 1, Python Basics. Part 2, Python Basics. Part 3, Python Data Structures in Practice, Working with Strings in Python, SQL Basics, Standard SQL Functions, SQL Practice Set, Writing User-Defined Functions in PostgreSQL, SQL JOINs, Window Functions, Recursive Queries, How to INSERT, UPDATE, and DELETE Data in SQL, Creating Tables in SQL, PostGIS, Introduction to R, Tidyverse, Data Visualization 101, Statistics 101, SQL Basics in MS SQL Server, How to Insert, Update, or Delete Data in MS SQL Server, Common Functions in MS SQL Server, Creating Basic SQL Reports in SQL Server, Window Functions in MS SQL Server, Recursive Queries in MS SQL Server, GROUP BY Extensions in MS SQL Server, How to Read and Write CSV Files in Python, How to Read and Write JSON Files in Python, Introduction to Python for Data Science, Lists and Functions in R

    Bundle price $189

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    SQL Complete Track

    Includes 9 courses SQL Basics, Standard SQL Functions, SQL Practice Set, SQL JOINs, Window Functions, Recursive Queries, How to INSERT, UPDATE, and DELETE Data in SQL, Creating Tables in SQL, PostGIS

    Bundle price $95

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    Basic Data Analytics

    Includes 8 courses SQL Basics, SQL Practice Set, SQL JOINs, Introduction to R, Tidyverse, Data Visualization 101, Statistics 101, Introduction to Python for Data Science

    Bundle price $95

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    SQL First Aid

    Includes 5 courses SQL Basics, Standard SQL Functions, SQL Practice Set, SQL JOINs, Creating Tables in SQL

    Bundle price $65

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    Table of contents

    Progress: 0% completed 0 of 88 exercises done

    1. Warm up: Selecting from one table

    Review the fundamentals of SQL. Practise using SELECT and WHERE to filter data.

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    0% completed 0 of 9 exercises done

    2. Aggregation and grouping

    Test your knowledge of GROUP BY and ORDER BY clauses.

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    0% completed 0 of 11 exercises done

    3. JOINs

    Practise using JOIN, LEFT JOIN, and non-equi JOIN. Check your skills of working with multiple tables.

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    0% completed 0 of 31 exercises done

    4. Subqueries

    Verify your knowledge of subqueries. Practise simple and correlated subqueries.

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    0% completed 0 of 15 exercises done

    5. SQL Challenge

    Practise your SQL skills. Write SQL queries which combine SELECT, WHERE, JOIN, GROUP BY, HAVING, ORDER BY and subqueries.

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    0% completed 0 of 22 exercises done

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