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Introduction to SQL

4.7+
867 reviews
Beginner

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

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2 Hours7 Videos24 Exercises206,566 Learners1650 XPData Analyst in SQL TrackData Engineer TrackSQL Fundamentals Track

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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

    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.

    Play Chapter Now
    Databases
    50 xp
    What are the advantages of databases?
    50 xp
    Data organization
    50 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

    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.

    Play Chapter Now
    Introducing queries
    50 xp
    SQL strengths
    50 xp
    Developing SQL style
    100 xp
    Querying the books table
    100 xp
    Writing queries
    50 xp
    Making queries DISTINCT
    100 xp
    Aliasing
    100 xp
    VIEWing your query
    100 xp
    SQL flavors
    50 xp
    Comparing flavors
    100 xp
    Limiting results
    100 xp
    Translating between flavors
    50 xp
    Congratulations!
    50 xp

In the following tracks

Data Analyst in SQLData EngineerSQL Fundamentals

Collaborators

Amy Peterson
James Chapman
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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  • Mohammad J.
    about 17 hours

    I enjoyed the the introduction, but I’m going to repeat it because I felt like it wasn’t for me as a beginner. I liked it and I will definitely recommend it. Learning and repeating are endless. Thanks Datacamp and I will keep camping on my new path of adventure.

  • Ibrahim K.
    2 days

    Awesome

  • Olamide O.
    2 days

    It was a great experience and lesson on SQL

  • Pauline I.
    2 days

    The above topic opened my thought to how data is retrieved and stored in a database. The significance of knowing the concept of SQL especially the difference between the two types of SQL.

  • Juan G.
    3 days

    Very user-friendly!

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"I enjoyed the the introduction, but I’m going to repeat it because I felt like it wasn’t for me as a beginner. I liked it and I will definitely recommend it. Learning and repeating are endless. Thanks Datacamp and I will keep camping on my new path of adventure."

Mohammad J.

"Awesome"

Ibrahim K.

"It was a great experience and lesson on SQL"

Olamide O.

FAQs

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