Summarizing Data in SQL

In SQL, summary functions are used to summarize data in different groups based on specific criteria that have previously been defined by a set of expressions. By summarizing data you can get a quick review of large datasets, making it easier for you to analyze the data.

In this course we’ll dive into advanced SQL concepts like aggregate functions and summary statistics. These concepts are key in helping learners perform a variety of useful functions to gain insights from extensive datasets.

This course focuses on the following points:

  • Establishing a foundation in computing statistics in SQL
  • Building proficiency employing and combining aggregate functions and clauses
  • Excelling in writing complex, impactful and real-world SQL queries

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What You’ll Learn

In this SQL course, you’ll build upon the fundamental coding skills you learned in our previous courses and start tackling more advanced real-world data problems. First, you’ll learn how to use SQL to compute statistics and filter results, then we’ll introduce you to the use of aggregate functions and clauses like WHERE and GROUP BY.

And finally, you’ll wrap up this course by learning more advanced database grouping and filtering techniques.

Enroll in this course if you want to do the following:

  • Employ SQL to compute statistics
  • Provide statistics by group
  • Combine aggregate functions with the WHERE clause
  • Combine aggregate and scalar functions
  • Combine aggregate functions and arithmetic operators
  • Define the GROUP BY clause
  • Apply the GROUP BY clause
  • Employ the GROUP BY clause with aggregate functions
  • Group database rows based on several criteria
  • Filter aggregate rows
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SQL developers earn approx. $93K/yr, according to ZipRecruiter

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SQL development jobs expected to grow 11% over the next decade – Burning Glass

SQL ranks in Top 10 most popular programming languages per TIOBE

How Our SQL Summary Course Works

Despite being over 50 years old, SQL remains the de facto language of databases. And with data being collected, stored, and analyzed like never before, SQL is, by all accounts, one of the most in-demand skills in data science. Most data professionals use SQL more than any other language.

That’s why we’ve created the SQL Fundamentals skill path, which this course is a part of. At Dataquest, we design all of our courses to help you quickly and effectively advance on your data science path. We’ve taken great care to ensure that you can maximize your learning potential by supplying the structure and support you need while allowing you the freedom and independence to learn at your own pace.

Unlike most online courses, here at Dataquest, we believe in learning by doing. When you learn with us, you’ll never sit through boring training videos or complete ineffective “fill-in-the-blank” questions. Instead, you’ll learn SQL the right way: solving real problems using real code—and you’ll start on day one.

Additionally, with Dataquest, you’ll never learn alone. We have a thriving community of data learners and professionals eager to accompany you on your learning path and help you overcome any obstacles you encounter. And if you ever need a little extra help, our powerful and responsive support tools are just a click away.

Here’s a glance at our SQL Summary course:

Enroll in this Course to learn SQL Summary!

Summarizing Data in SQL Lessons List


Aggregate Functions with SQL

In this lesson, you’ll learn all about aggregate functions and how to use them with SQL.

Summary Statistics with SQL

This lesson covers how to use aggregate functions with other SQL clauses. You’ll learn how to work with where clauses, scalar functions, and arithmetic operators.

Group Summary Statistics with SQL

Learn how to use the “GROUP BY” clause with aggregate functions in SQL.

Multiple Group Summary Statistics

This lesson explains how to use multiple group summaries and how to filter aggregate work.

Who Is This SQL Summary Course For?

This SQL course is for beginners, but requires that you be familiar with the concepts and techniques covered in the previous two courses of our SQL Fundamentals skills path. If you missed the previous lessons or would like a refresher, check out our previous courses before moving on.

We’ve designed this course to benefit as many people as possible:

Students Who Enrolled in this Course Also Enrolled in:

Learning SQL to begin a career in data science? If so, we’ve got your back! We’ve created several career and skill paths that are specifically geared towards making you job-ready, so that you can get hired faster. Consider the following paths to jumpstart your data science career:

If you already have a data science background and simply want to enhance your job performance, we recommend the following courses to broaden your knowledge and data science skill set:

Qualify for In-demand Jobs in Data Science With SQL

If you can acquire proficiency in SQL, you’ll be a hot commodity in the highly competitive data science job market. Virtually all industries are leveraging data science, and most use SQL.

With the skills you’ll learn in this course, you’ll set yourself up for success in any of the following in-demand data specializations: