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Introduction to SQL

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

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2 Hours7 Videos24 Exercises30,600 Learners1700 XPData Analyst TrackSQL Fundamentals Track

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Course Description

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 this two-hour introduction to SQL, 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.

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.

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.

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 on projects or continue your learning in a more specialized direction.

  1. 1

    Relational Databases

    Free

    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.

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    Databases
    50 xp
    Data organization
    50 xp
    Database advantages
    100 xp
    Tables
    50 xp
    Picking a unique ID
    50 xp
    Setting the table in style
    100 xp
    Our very own table
    50 xp
    Data
    50 xp
    At your service
    50 xp
    Finding data types
    50 xp
    Choice of type
    100 xp
  2. 2

    Querying

    Free

    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 AnalystSQL Fundamentals

Collaborators

james-datacamp
James Chapman
amy-4121b590-cc52-442a-9779-03eb58089e08
Amy Peterson
Izzy Weber Headshot

Izzy Weber

Curriculum Manager, DataCamp

Izzy is a Curriculum Manager at DataCamp. 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 for students.
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