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Introduction to SQL

1,135 reviews

Learn how to create and query relational databases using SQL in just two hours.

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2 Hours7 Videos24 Exercises
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Course Description

Get an Introduction to SQL in Two Hours

Much of the world's raw data—from electronic medical records to customer transaction histories—lives in organized collections of tables called relational databases. Being able to wrangle and extract data from these databases using SQL is an essential skill within the data industry and in increasing demand.

In just two hours, you'll get to know the theory and the practice through bite-sized videos and interactive exercises where you can put your new-found skills to the test.

Learn how Relational Databases are Organized

SQL is an essential language for building and maintaining relational databases, which opens the door to a range of careers in the data industry and beyond. You’ll start this course by covering data organization, tables, and best practices for database construction.

Write Your First SQL Queries

The second half of this course looks at creating SQL queries for selecting data that you need from your database. You’ll have the chance to practice your querying skills before moving on to customizing and saving your results.

Understand the Difference Between PostgreSQL and SQL Server

PostgreSQL and SQL Server are two of the most popular SQL flavors. You’ll finish off this course by looking at the differences, benefits, and applications of each. By the end of the course, you’ll have some hands-on experience in learning SQL and the grounding to start applying it to projects or continue your learning in a more specialized direction.
  1. 1

    Relational Databases


    Before writing any SQL queries, it’s important to understand the underlying data. In this chapter, we’ll discover the role of SQL in creating and querying relational databases. Using a database for a local library, we will explore database and table organization, data types and storage, and best practices for database construction.

    Play Chapter Now
    50 xp
    What are the advantages of databases?
    50 xp
    Data organization
    50 xp
    50 xp
    Picking a unique ID
    50 xp
    Setting the table in style
    100 xp
    Our very own table
    50 xp
    50 xp
    At your service
    50 xp
    Finding data types
    50 xp
    Choice of type
    100 xp
  2. 2


    Learn your first SQL keywords for selecting relevant data from database tables! After practicing querying skills in a database of books, you’ll customize query results using aliasing and save them as views so they can be shared. Finally, you’ll explore the differences between SQL flavors and databases such as PostgreSQL and SQL Server.

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In the following tracks

Data Analyst in SQLData EngineerData Scientist Professional with PythonData Scientist Professional with RSQL Fundamentals


Collaborator's avatar
Amy Peterson
Collaborator's avatar
James Chapman
Izzy Weber HeadshotIzzy Weber

Data Coach at iO-Sphere

Izzy is a Data Coach at iO-Sphere. She discovered a love for data during her seven years as an accounting professor at the University of Washington. She holds a masters degree in Taxation and is a Certified Public Accountant. Her passion is making learning technical topics fun.
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Don’t just take our word for it

from 1,135 reviews
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  • Obaid K.
    1 day

    Supreme clarity and brevity. What more could you ask for?

  • Sitraka F.
    2 days

    Cool intro :)

  • Jonathan L.
    3 days

    The classes are awesome.

  • Oscar Q.
    7 days

    I liked the course, easy and clear

  • Ekta B.
    10 days

    Nicely taught basic concepts.

"Supreme clarity and brevity. What more could you ask for?"

Obaid K.

"Cool intro :)"

Sitraka F.

"The classes are awesome."

Jonathan L.


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