Course

Combining Tables in SQL

In this course, you’ll learn how to combine data from multiple tables using SQL

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Part of the SQL, and Business Analyst (Power BI) paths.

4.8 (359 reviews)

9,599 learners enrolled in this course.

Intermediate friendly
4 hours
Self paced
4 lessons

“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

Combining Tables in SQL

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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 [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

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Machine Learning Engineer at Twitter

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