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If you’re interested in transitioning into a data career, you probably know the following: Use data effectively to answer business questions It’s at the core of most data professions, regardless of the tools you use. By building the right skill set, you can land a job as a data analyst and gradually explore other roles such as data scientist or her BI analyst. So where do I start?
Should I learn a programming language like Python or R? Or should I jump right into learning a BI tool like Tableau? Or SQL?
SQL is a must-know tool and arguably the most important skill for a wide range of data professionals, from data analysts to data scientists to data engineers. That’s why we’ve created a list of beginner courses that will teach you the basics of SQL in a few hours.
Introduction to SQL: Querying and Managing Data is a free course available at Khan Academy. Learn how to query and manipulate data in relational database tables.
This course includes several short lessons, followed by assignments to test your understanding. The course is divided into the following sections:
- of SQL basics This section covers the basics such as creating tables and inserting data, querying and aggregating data, and more.
- of More advanced SQL queries This section describes logical operators, IN operator, LIKE operator, and HAVING.
- section SQL relational queries It focuses on using data from multiple tables to answer questions using various types of joins.
- of Modifying the database using SQL This section describes how to modify table schemas using SQL.
Link: SQL Overview: Querying and Managing Data
If you prefer to learn through instructor-led video tutorials, SQL Tutorial – Full Database Course for Beginners is a great introduction to SQL.
In approximately 4.5 hours, you will learn both the basics of database design and querying databases using SQL. It uses MySQL, one of the most widely used relational database management systems (RDBMS).
First, we’ll discuss designing a database schema and performing CRUD operations using SQL. Next, you’ll learn about aggregations, nested queries, joins, unions, functions, and triggers.
Link: SQL Tutorial – Complete Database Course for Beginners
Kaggle’s Introductory SQL course is also a good option if you prefer a text-based tutorial followed by exercises.
In this introductory SQL course, learn how to query datasets with SQL using the BigQuery Python client. Topics covered include:
- Basics of SQL
- filtering
- totalling
- combine
- Creating readable SQL queries
Link: SQL Overview
W3Schools’ SQL Tutorials are also a great resource for beginners to learn the basics of SQL commands and functions. This tutorial consists of multiple short lessons, each focusing on a specific command or feature. So we’ll learn what the command is, how it works, and then we’ll show you an example.
You can solve the examples in the online editor without having to install anything locally. This tutorial covers the basics of SQL as well as various logical operators, window functions, and more. It also describes changes to database tables, constraints, and more.
This tutorial is not only a learning resource, but also a concise reference. So if you want a quick look at the syntax and usage examples for a particular function, you might want to bookmark this SQL tutorial.
Link: SQL Tutorial
SQLZoo is another platform for beginners to learn and practice SQL. SQLZoo provides easy lessons with simple exercises for each, from basic SELECT statements to advanced concepts such as window functions.
Topics covered include:
- SELECT statement
- Aggregate function
- Types of JOINs
- Understanding NULLs
- window function
There’s also a set of assessment questions, including some more difficult SQL questions. You can take it to test yourself.
Link: SQLZoo
We hope you found this free SQL course summary useful. These courses are designed to help you learn the basics of SQL in a few hours.
If you’re looking for free learning resources with a more extensive curriculum, here’s a roundup of some that you might find useful.
These courses also require additional effort on your part and typically take several weeks to complete. So keep learning and practicing!
Rose Priya C I’m a developer and technical writer from India. She loves working at the intersection of math, programming, and data. She loves working at the intersection of science and content creation. Her interests and expertise include DevOps, data science, and natural language processing. She loves reading, writing, coding, and coffee. Currently, she is committed to learning and sharing her knowledge with the developer community by creating tutorials, how-to guides, opinion articles, and more. Bala also creates engaging resource summaries and coding tutorials for her.
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