Victoria

“I really love learning on Dataquest. I looked into a couple of other options and I found that they were much too handhold-y and fill in the blank relative to Dataquest’s method.”

Victoria E. Guzik

Associate Data Scientist

Course overview

Joins in SQL allow you to combine datasets from multiple tables using a single query. In this course, you’ll learn how joins work, how to combine data from more than one table using inner joins, how to select columns from different tables, and how to alias tables.

Best of all, you’ll learn by doing — you’ll practice and get feedback directly in the browser.

Key skills

  • Combining tables using inner joins
  • Employing different types of joins
  • Employing other SQL clauses with joins
  • Employing set operators like UNION and EXCEPT

Course outline

Combining Tables in SQL Course [4 lessons]

Introduction to Joins 1h

Lesson Objectives
  • Combine data from more than one table using inner joins
  • Define joins work
  • Select columns from different tables
  • Alias tables

Joins and Other Clauses 1h

Lesson Objectives
  • Join more than two tables
  • Identify how joins interplay with other clauses

Less Common Joins 2h

Lesson Objectives
  • Define self-joins
  • Join tables on complex conditions
  • Define right and full joins
  • Employ cross joins

Set Operators 1h

Lesson Objectives
  • Stack tables
  • Keep rows in two tables
  • Keep rows that are in one table and not in another

The Dataquest guarantee

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Challenge yourself with exercises

Challenge yourself with exercises

Work with real data from day one with interactive lessons and hands-on exercises.

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Aaron

Aaron Melton

Business Analyst at Aditi Consulting

“Dataquest starts at the most basic level, so a beginner can understand the concepts. I tried learning to code before, using Codecademy and Coursera. I struggled because I had no background in coding, and I was spending a lot of time Googling. Dataquest helped me actually learn.”

Jessi

Jessica Ko

Machine Learning Engineer at Twitter

“I liked the interactive environment on Dataquest. The material was clear and well organized. I spent more time practicing then watching videos and it made me want to keep learning.”

Victoria

Victoria E. Guzik

Associate Data Scientist at Callisto Media

“I really love learning on Dataquest. I looked into a couple of other options and I found that they were much too handhold-y and fill in the blank relative to Dataquest’s method. The projects on Dataquest were key to getting my job. I doubled my income!”

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